265438920 has 64 divisors (see below), whose sum is σ = 815754240. Its totient is φ = 69056000.

The previous prime is 265438913. The next prime is 265438933. The reversal of 265438920 is 29834562.

It is a happy number.

265438920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22056 + ... + 31895.

It is an arithmetic number, because the mean of its divisors is an integer number (12746160).

Almost surely, 2^265438920 is an apocalyptic number.

265438920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265438920 is an abundant number, since it is smaller than the sum of its proper divisors (550315320).

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

265438920 is a wasteful number, since it uses less digits than its factorization.

265438920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54006 (or 54002 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 265438920 is about 16292.2963390677. The cubic root of 265438920 is about 642.6702562217.

The spelling of 265438920 in words is "two hundred sixty-five million, four hundred thirty-eight thousand, nine hundred twenty".