265816320 has 576 divisors, whose sum is σ = 1130250240. Its totient is φ = 51609600.

The previous prime is 265816307. The next prime is 265816337. The reversal of 265816320 is 23618562.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8574705 + ... + 8574735.

It is an arithmetic number, because the mean of its divisors is an integer number (1962240).

Almost surely, 2^265816320 is an apocalyptic number.

265816320 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 265816320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565125120).

265816320 is an abundant number, since it is smaller than the sum of its proper divisors (864433920).

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

265816320 is a wasteful number, since it uses less digits than its factorization.

265816320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 265816320 is about 16303.8743861697. The cubic root of 265816320 is about 642.9746939886.

The spelling of 265816320 in words is "two hundred sixty-five million, eight hundred sixteen thousand, three hundred twenty".