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13872280 = 2351918253
BaseRepresentation
bin110100111010…
…110010011000
3222002210012011
4310322302120
512022403110
61213155304
7225624652
oct64726230
928083164
1013872280
1179154a4
12478bb34
132b49266
141bb16d2
15134048a
hexd3ac98

13872280 has 32 divisors (see below), whose sum is σ = 32857200. Its totient is φ = 5256576.

The previous prime is 13872253. The next prime is 13872281. The reversal of 13872280 is 8227831.

13872280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13872281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8367 + ... + 9886.

Almost surely, 213872280 is an apocalyptic number.

13872280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13872280 is an abundant number, since it is smaller than the sum of its proper divisors (18984920).

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

13872280 is a wasteful number, since it uses less digits than its factorization.

13872280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18283 (or 18279 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 13872280 is about 3724.5509796484. The cubic root of 13872280 is about 240.2790735139.

The spelling of 13872280 in words is "thirteen million, eight hundred seventy-two thousand, two hundred eighty".

Divisors: 1 2 4 5 8 10 19 20 38 40 76 95 152 190 380 760 18253 36506 73012 91265 146024 182530 346807 365060 693614 730120 1387228 1734035 2774456 3468070 6936140 13872280