255620990 has 16 divisors (see below), whose sum is σ = 460373760. Its totient is φ = 102191520.

The previous prime is 255620969. The next prime is 255620999. The reversal of 255620990 is 99026552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255620999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15056 + ... + 27164.

It is an arithmetic number, because the mean of its divisors is an integer number (28773360).

Almost surely, 2^255620990 is an apocalyptic number.

255620990 is a deficient number, since it is larger than the sum of its proper divisors (204752770).

255620990 is a wasteful number, since it uses less digits than its factorization.

255620990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14227.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 255620990 is about 15988.1515504451. The cubic root of 255620990 is about 634.6469113974.

The spelling of 255620990 in words is "two hundred fifty-five million, six hundred twenty thousand, nine hundred ninety".