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6981072 = 243779263
BaseRepresentation
bin11010101000010111010000
3111010200020020
4122220113100
53241343242
6405343440
7113223660
oct32502720
914120206
106981072
113a38a8a
122407b80
1315a5717
14cda1a0
1592d6ec
hex6a85d0

6981072 has 80 divisors (see below), whose sum is σ = 20951040. Its totient is φ = 1961856.

The previous prime is 6981059. The next prime is 6981103. The reversal of 6981072 is 2701896.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26413 + ... + 26675.

It is an arithmetic number, because the mean of its divisors is an integer number (261888).

Almost surely, 26981072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6981072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10475520).

6981072 is an abundant number, since it is smaller than the sum of its proper divisors (13969968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6981072 is a wasteful number, since it uses less digits than its factorization.

6981072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 6981072 is about 2642.1718339275. The cubic root of 6981072 is about 191.1205437726.

It can be divided in two parts, 698 and 1072, that added together give a triangular number (1770 = T59).

The spelling of 6981072 in words is "six million, nine hundred eighty-one thousand, seventy-two".

Divisors: 1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 56 79 84 112 158 168 237 263 316 336 474 526 553 632 789 948 1052 1106 1264 1578 1659 1841 1896 2104 2212 3156 3318 3682 3792 4208 4424 5523 6312 6636 7364 8848 11046 12624 13272 14728 20777 22092 26544 29456 41554 44184 62331 83108 88368 124662 145439 166216 249324 290878 332432 436317 498648 581756 872634 997296 1163512 1745268 2327024 3490536 6981072