255864140 has 48 divisors (see below), whose sum is σ = 615014400. Its totient is φ = 87590592.

The previous prime is 255864137. The next prime is 255864143. The reversal of 255864140 is 41468552.

It is an interprime number because it is at equal distance from previous prime (255864137) and next prime (255864143).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 255864140.

It is not an unprimeable number, because it can be changed into a prime (255864143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144581 + ... + 146339.

It is an arithmetic number, because the mean of its divisors is an integer number (12812800).

Almost surely, 2^255864140 is an apocalyptic number.

255864140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255864140 is an abundant number, since it is smaller than the sum of its proper divisors (359150260).

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

255864140 is a wasteful number, since it uses less digits than its factorization.

255864140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814 (or 2812 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 255864140 is about 15995.7538115589. The cubic root of 255864140 is about 634.8480757511.

The spelling of 255864140 in words is "two hundred fifty-five million, eight hundred sixty-four thousand, one hundred forty".