628238404 has 12 divisors (see below), whose sum is σ = 1099747264. Its totient is φ = 314024904.

The previous prime is 628238341. The next prime is 628238437. The reversal of 628238404 is 404832826.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7344 + ... + 36199.

Almost surely, 2^628238404 is an apocalyptic number.

It is an amenable number.

628238404 is a deficient number, since it is larger than the sum of its proper divisors (471508860).

628238404 is a wasteful number, since it uses less digits than its factorization.

628238404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47154 (or 47152 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 628238404 is about 25064.6843985716. The cubic root of 628238404 is about 856.4621216411.

The spelling of 628238404 in words is "six hundred twenty-eight million, two hundred thirty-eight thousand, four hundred four".