628556764 has 24 divisors (see below), whose sum is σ = 1209899376. Its totient is φ = 285705200.

The previous prime is 628556729. The next prime is 628556767. The reversal of 628556764 is 467655826.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628556767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53707 + ... + 64354.

It is an arithmetic number, because the mean of its divisors is an integer number (50412474).

Almost surely, 2^628556764 is an apocalyptic number.

It is an amenable number.

628556764 is a deficient number, since it is larger than the sum of its proper divisors (581342612).

628556764 is a wasteful number, since it uses less digits than its factorization.

628556764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118098 (or 118074 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 49.

The square root of 628556764 is about 25071.0343623872. The cubic root of 628556764 is about 856.6067680232.

The spelling of 628556764 in words is "six hundred twenty-eight million, five hundred fifty-six thousand, seven hundred sixty-four".