628920747 has 32 divisors (see below), whose sum is σ = 1146754560. Its totient is φ = 331737120.

The previous prime is 628920739. The next prime is 628920749. The reversal of 628920747 is 747029826.

It is not a de Polignac number, because 628920747 - 2³ = 628920739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628920749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125529 + ... + 130442.

It is an arithmetic number, because the mean of its divisors is an integer number (35836080).

Almost surely, 2^628920747 is an apocalyptic number.

628920747 is a deficient number, since it is larger than the sum of its proper divisors (517833813).

628920747 is a wasteful number, since it uses less digits than its factorization.

628920747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256000 (or 255994 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 628920747 is about 25078.2923461706. The cubic root of 628920747 is about 856.7720833163.

The spelling of 628920747 in words is "six hundred twenty-eight million, nine hundred twenty thousand, seven hundred forty-seven".