628404284 has 12 divisors (see below), whose sum is σ = 1099932624. Its totient is φ = 314137824.

The previous prime is 628404281. The next prime is 628404289. The reversal of 628404284 is 482404826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628404281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10952 + ... + 37104.

It is an arithmetic number, because the mean of its divisors is an integer number (91661052).

Almost surely, 2^628404284 is an apocalyptic number.

It is an amenable number.

628404284 is a deficient number, since it is larger than the sum of its proper divisors (471528340).

628404284 is a wasteful number, since it uses less digits than its factorization.

628404284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32164 (or 32162 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 38.

The square root of 628404284 is about 25067.9932184449. The cubic root of 628404284 is about 856.5374950628.

The spelling of 628404284 in words is "six hundred twenty-eight million, four hundred four thousand, two hundred eighty-four".