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261080402 = 21199711903
BaseRepresentation
bin11111000111111…
…00010101010010
3200012021020222112
433203330111102
51013314033102
641523505322
76320101232
oct1743742522
9605236875
10261080402
11124411630
1273528242
1342121c5b
1426961cc2
1517dc2252
hexf8fc552

261080402 has 16 divisors (see below), whose sum is σ = 427686912. Its totient is φ = 118543920.

The previous prime is 261080353. The next prime is 261080423. The reversal of 261080402 is 204080162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15983 + ... + 27885.

It is an arithmetic number, because the mean of its divisors is an integer number (26730432).

Almost surely, 2261080402 is an apocalyptic number.

261080402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261080402 is a deficient number, since it is larger than the sum of its proper divisors (166606510).

261080402 is a wasteful number, since it uses less digits than its factorization.

261080402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12913.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 261080402 is about 16157.9826092245. The cubic root of 261080402 is about 639.1332684749.

The spelling of 261080402 in words is "two hundred sixty-one million, eighty thousand, four hundred two".

Divisors: 1 2 11 22 997 1994 10967 11903 21934 23806 130933 261866 11867291 23734582 130540201 261080402