628427644 has 48 divisors (see below), whose sum is σ = 1275372000. Its totient is φ = 268333056.

The previous prime is 628427633. The next prime is 628427669. The reversal of 628427644 is 446724826.

It is a self number, because there is not a number n which added to its sum of digits gives 628427644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46132 + ... + 58180.

It is an arithmetic number, because the mean of its divisors is an integer number (26570250).

Almost surely, 2^628427644 is an apocalyptic number.

It is an amenable number.

628427644 is an abundant number, since it is smaller than the sum of its proper divisors (646944356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628427644 is a wasteful number, since it uses less digits than its factorization.

628427644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12142 (or 12140 counting only the distinct ones).

The product of its digits is 516096, while the sum is 43.

The square root of 628427644 is about 25068.4591469041. The cubic root of 628427644 is about 856.5481084363.

The spelling of 628427644 in words is "six hundred twenty-eight million, four hundred twenty-seven thousand, six hundred forty-four".