265297920 has 224 divisors, whose sum is σ = 905914368. Its totient is φ = 66060288.

The previous prime is 265297883. The next prime is 265297933. The reversal of 265297920 is 29792562.

It is a congruent number.

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, 2088897 + ... + 2089023.

Almost surely, 2^265297920 is an apocalyptic number.

265297920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265297920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452957184).

265297920 is an abundant number, since it is smaller than the sum of its proper divisors (640616448).

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

265297920 is a wasteful number, since it uses less digits than its factorization.

265297920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 265297920 is about 16287.9685657850. The cubic root of 265297920 is about 642.5564415183.

The spelling of 265297920 in words is "two hundred sixty-five million, two hundred ninety-seven thousand, nine hundred twenty".