255840830 has 32 divisors (see below), whose sum is σ = 543283200. Its totient is φ = 84886560.

The previous prime is 255840821. The next prime is 255840847. The reversal of 255840830 is 38048552.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56780 + ... + 61119.

It is an arithmetic number, because the mean of its divisors is an integer number (16977600).

Almost surely, 2^255840830 is an apocalyptic number.

255840830 is an abundant number, since it is smaller than the sum of its proper divisors (287442370).

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

255840830 is a wasteful number, since it uses less digits than its factorization.

255840830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117944.

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

The square root of 255840830 is about 15995.0251640940. The cubic root of 255840830 is about 634.8287963032.

The spelling of 255840830 in words is "two hundred fifty-five million, eight hundred forty thousand, eight hundred thirty".