255930393 has 16 divisors (see below), whose sum is σ = 362771136. Its totient is φ = 159936000.

The previous prime is 255930373. The next prime is 255930401. The reversal of 255930393 is 393039552.

It is not a de Polignac number, because 255930393 - 2⁸ = 255930137 is a prime.

It is a super-2 number, since 2×255930393² = 131000732122268898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (255930373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2805 + ... + 22797.

It is an arithmetic number, because the mean of its divisors is an integer number (22673196).

Almost surely, 2^255930393 is an apocalyptic number.

It is an amenable number.

255930393 is a deficient number, since it is larger than the sum of its proper divisors (106840743).

255930393 is a wasteful number, since it uses less digits than its factorization.

255930393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20264.

The product of its (nonzero) digits is 109350, while the sum is 39.

The square root of 255930393 is about 15997.8246333681. The cubic root of 255930393 is about 634.9028664950.

The spelling of 255930393 in words is "two hundred fifty-five million, nine hundred thirty thousand, three hundred ninety-three".