261323392 has 32 divisors (see below), whose sum is σ = 567936000. Its totient is φ = 118782720.

The previous prime is 261323369. The next prime is 261323399. The reversal of 261323392 is 293323162.

261323392 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (261323399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91392 + ... + 94207.

It is an arithmetic number, because the mean of its divisors is an integer number (17748000).

Almost surely, 2^261323392 is an apocalyptic number.

261323392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261323392 is an abundant number, since it is smaller than the sum of its proper divisors (306612608).

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

261323392 is a wasteful number, since it uses less digits than its factorization.

261323392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185624 (or 185612 counting only the distinct ones).

The product of its digits is 11664, while the sum is 31.

The square root of 261323392 is about 16165.5000541276. The cubic root of 261323392 is about 639.3314894520.

The spelling of 261323392 in words is "two hundred sixty-one million, three hundred twenty-three thousand, three hundred ninety-two".