628689724 has 48 divisors (see below), whose sum is σ = 1242702720. Its totient is φ = 276272640.

The previous prime is 628689709. The next prime is 628689749. The reversal of 628689724 is 427986826.

628689724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 107229 + ... + 112939.

It is an arithmetic number, because the mean of its divisors is an integer number (25889640).

Almost surely, 2^628689724 is an apocalyptic number.

It is an amenable number.

628689724 is a deficient number, since it is larger than the sum of its proper divisors (614012996).

628689724 is a wasteful number, since it uses less digits than its factorization.

628689724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830 (or 5828 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The square root of 628689724 is about 25073.6858877988. The cubic root of 628689724 is about 856.6671637384.

The spelling of 628689724 in words is "six hundred twenty-eight million, six hundred eighty-nine thousand, seven hundred twenty-four".