628422388 has 12 divisors (see below), whose sum is σ = 1199715552. Its totient is φ = 285646520.

The previous prime is 628422371. The next prime is 628422401. The reversal of 628422388 is 883224826.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7141120 + ... + 7141207.

It is an arithmetic number, because the mean of its divisors is an integer number (99976296).

Almost surely, 2^628422388 is an apocalyptic number.

It is an amenable number.

628422388 is a deficient number, since it is larger than the sum of its proper divisors (571293164).

628422388 is a wasteful number, since it uses less digits than its factorization.

628422388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14282342 (or 14282340 counting only the distinct ones).

The product of its digits is 294912, while the sum is 43.

The square root of 628422388 is about 25068.3543137558. The cubic root of 628422388 is about 856.5457204502.

The spelling of 628422388 in words is "six hundred twenty-eight million, four hundred twenty-two thousand, three hundred eighty-eight".