255807830 has 16 divisors (see below), whose sum is σ = 484688880. Its totient is φ = 96937632.

The previous prime is 255807829. The next prime is 255807833. The reversal of 255807830 is 38708552.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255807833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672989 + ... + 673368.

It is an arithmetic number, because the mean of its divisors is an integer number (30293055).

Almost surely, 2^255807830 is an apocalyptic number.

255807830 is a deficient number, since it is larger than the sum of its proper divisors (228881050).

255807830 is a wasteful number, since it uses less digits than its factorization.

255807830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346383.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 255807830 is about 15993.9935600837. The cubic root of 255807830 is about 634.8015003590.

The spelling of 255807830 in words is "two hundred fifty-five million, eight hundred seven thousand, eight hundred thirty".