626404628 has 12 divisors (see below), whose sum is σ = 1102545780. Its totient is φ = 311391552.

The previous prime is 626404621. The next prime is 626404633. The reversal of 626404628 is 826404626.

It can be written as a sum of positive squares in 2 ways, for example, as 568917904 + 57486724 = 23852^2 + 7582^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 626404591 and 626404600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626404621) 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, 451913 + ... + 453296.

It is an arithmetic number, because the mean of its divisors is an integer number (91878815).

Almost surely, 2^626404628 is an apocalyptic number.

It is an amenable number.

626404628 is a deficient number, since it is larger than the sum of its proper divisors (476141152).

626404628 is a wasteful number, since it uses less digits than its factorization.

626404628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905386 (or 905384 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 626404628 is about 25028.0767938729. The cubic root of 626404628 is about 855.6279954730.

The spelling of 626404628 in words is "six hundred twenty-six million, four hundred four thousand, six hundred twenty-eight".