626861264 has 20 divisors (see below), whose sum is σ = 1285988004. Its totient is φ = 294993408.

The previous prime is 626861203. The next prime is 626861269. The reversal of 626861264 is 462168626.

It can be written as a sum of positive squares in 2 ways, for example, as 551310400 + 75550864 = 23480^2 + 8692^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626861269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152047 + ... + 1152590.

Almost surely, 2^626861264 is an apocalyptic number.

It is an amenable number.

626861264 is an abundant number, since it is smaller than the sum of its proper divisors (659126740).

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

626861264 is a wasteful number, since it uses less digits than its factorization.

626861264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304662 (or 2304656 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 626861264 is about 25037.1976067610. The cubic root of 626861264 is about 855.8358566681.

The spelling of 626861264 in words is "six hundred twenty-six million, eight hundred sixty-one thousand, two hundred sixty-four".