265969920 has 72 divisors (see below), whose sum is σ = 849453696. Its totient is φ = 70924288.

The previous prime is 265969889. The next prime is 265969927. The reversal of 265969920 is 29969562.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 265969920.

It is not an unprimeable number, because it can be changed into a prime (265969927) 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, 30792 + ... + 38471.

It is an arithmetic number, because the mean of its divisors is an integer number (11797968).

Almost surely, 2^265969920 is an apocalyptic number.

265969920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265969920 is an abundant number, since it is smaller than the sum of its proper divisors (583483776).

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

265969920 is an equidigital number, since it uses as much as digits as its factorization.

265969920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69287 (or 69273 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 265969920 is about 16308.5842426619. The cubic root of 265969920 is about 643.0985162033.

The spelling of 265969920 in words is "two hundred sixty-five million, nine hundred sixty-nine thousand, nine hundred twenty".