255973920 has 96 divisors (see below), whose sum is σ = 810710208. Its totient is φ = 67888128.

The previous prime is 255973903. The next prime is 255973931. The reversal of 255973920 is 29379552.

It is a tau number, because it is divible by the number of its divisors (96).

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, 93207 + ... + 95913.

It is an arithmetic number, because the mean of its divisors is an integer number (8444898).

Almost surely, 2^255973920 is an apocalyptic number.

255973920 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 255973920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405355104).

255973920 is an abundant number, since it is smaller than the sum of its proper divisors (554736288).

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

255973920 is a wasteful number, since it uses less digits than its factorization.

255973920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922 (or 2914 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 255973920 is about 15999.1849792419. The cubic root of 255973920 is about 634.9388578574.

The spelling of 255973920 in words is "two hundred fifty-five million, nine hundred seventy-three thousand, nine hundred twenty".