626404 has 6 divisors (see below), whose sum is σ = 1096214. Its totient is φ = 313200.

The previous prime is 626393. The next prime is 626443. The reversal of 626404 is 404626.

626404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 2304 = 790^2 + 48^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78297 + ... + 78304.

2⁶²⁶⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

626404 is a deficient number, since it is larger than the sum of its proper divisors (469810).

626404 is a wasteful number, since it uses less digits than its factorization.

626404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156605 (or 156603 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 626404 is about 791.4568844858. The cubic root of 626404 is about 85.5627709537.

The spelling of 626404 in words is "six hundred twenty-six thousand, four hundred four".