Search a number
-
+
67978750 = 254717457
BaseRepresentation
bin1000000110101…
…00010111111110
311201220200022111
410003110113332
5114400310000
610425004234
71453544530
oct403242776
9151820274
1067978750
1135410494
121a92367a
1311111818
149057850
155e7bcba
hex40d45fe

67978750 has 80 divisors (see below), whose sum is σ = 154525536. Its totient is φ = 21888000.

The previous prime is 67978727. The next prime is 67978763. The reversal of 67978750 is 5787976.

It is a super-2 number, since 2×679787502 = 9242220903125000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67978694 and 67978703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 148522 + ... + 148978.

It is a vampire number, since it can be written as 77698750 (with its own digits).

Almost surely, 267978750 is an apocalyptic number.

67978750 is an abundant number, since it is smaller than the sum of its proper divisors (86546786).

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

67978750 is a wasteful number, since it uses less digits than its factorization.

67978750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 67978750 is about 8244.9226800498. The cubic root of 67978750 is about 408.1229885214.

The spelling of 67978750 in words is "sixty-seven million, nine hundred seventy-eight thousand, seven hundred fifty".

Divisors: 1 2 5 7 10 14 17 25 34 35 50 70 85 119 125 170 175 238 250 350 425 457 595 625 850 875 914 1190 1250 1750 2125 2285 2975 3199 4250 4375 4570 5950 6398 7769 8750 10625 11425 14875 15538 15995 21250 22850 29750 31990 38845 54383 57125 74375 77690 79975 108766 114250 148750 159950 194225 271915 285625 388450 399875 543830 571250 799750 971125 1359575 1942250 1999375 2719150 3998750 4855625 6797875 9711250 13595750 33989375 67978750