261204684 has 48 divisors (see below), whose sum is σ = 667144800. Its totient is φ = 79050240.

The previous prime is 261204683. The next prime is 261204701. The reversal of 261204684 is 486402162.

It is not an unprimeable number, because it can be changed into a prime (261204683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4209 + ... + 23240.

It is an arithmetic number, because the mean of its divisors is an integer number (13898850).

Almost surely, 2^261204684 is an apocalyptic number.

It is an amenable number.

261204684 is an abundant number, since it is smaller than the sum of its proper divisors (405940116).

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

261204684 is a wasteful number, since it uses less digits than its factorization.

261204684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27530 (or 27528 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 261204684 is about 16161.8279906699. The cubic root of 261204684 is about 639.2346678388.

The spelling of 261204684 in words is "two hundred sixty-one million, two hundred four thousand, six hundred eighty-four".