2568831990 has 32 divisors (see below), whose sum is σ = 6191673696. Its totient is φ = 682080000.

The previous prime is 2568831961. The next prime is 2568832001. The reversal of 2568831990 is 991388652.

It is a happy number.

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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176761 + ... + 190740.

It is an arithmetic number, because the mean of its divisors is an integer number (193489803).

Almost surely, 2^2568831990 is an apocalyptic number.

2568831990 is an abundant number, since it is smaller than the sum of its proper divisors (3622841706).

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

2568831990 is a wasteful number, since it uses less digits than its factorization.

2568831990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367744.

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 2568831990 is about 50683.6461790191. The cubic root of 2568831990 is about 1369.5521277402.

The spelling of 2568831990 in words is "two billion, five hundred sixty-eight million, eight hundred thirty-one thousand, nine hundred ninety".