255952240 has 40 divisors (see below), whose sum is σ = 596278800. Its totient is φ = 102176256.

The previous prime is 255952189. The next prime is 255952241. The reversal of 255952240 is 42259552.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×255952240² = 131023098322035200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255952196 and 255952205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255952241) 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, 40836 + ... + 46684.

It is an arithmetic number, because the mean of its divisors is an integer number (14906970).

Almost surely, 2^255952240 is an apocalyptic number.

255952240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255952240 is an abundant number, since it is smaller than the sum of its proper divisors (340326560).

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

255952240 is a wasteful number, since it uses less digits than its factorization.

255952240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6409 (or 6403 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 255952240 is about 15998.5074303824. The cubic root of 255952240 is about 634.9209317303.

The spelling of 255952240 in words is "two hundred fifty-five million, nine hundred fifty-two thousand, two hundred forty".