255250440 has 80 divisors (see below), whose sum is σ = 857935980. Its totient is φ = 68065920.

The previous prime is 255250433. The next prime is 255250441. The reversal of 255250440 is 44052552.

It can be written as a sum of positive squares in 2 ways, for example, as 237961476 + 17288964 = 15426^2 + 4158^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (255250441) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36151 + ... + 42630.

Almost surely, 2^255250440 is an apocalyptic number.

255250440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255250440 is an abundant number, since it is smaller than the sum of its proper divisors (602685540).

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

255250440 is a wasteful number, since it uses less digits than its factorization.

255250440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78804 (or 78791 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 255250440 is about 15976.5590788505. The cubic root of 255250440 is about 634.3401002098.

The spelling of 255250440 in words is "two hundred fifty-five million, two hundred fifty thousand, four hundred forty".