628832657 has 4 divisors (see below), whose sum is σ = 630584640. Its totient is φ = 627080676.

The previous prime is 628832641. The next prime is 628832671. The reversal of 628832657 is 756238826.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 628832657 - 2⁴ = 628832641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628832557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875453 + ... + 876170.

It is an arithmetic number, because the mean of its divisors is an integer number (157646160).

Almost surely, 2^628832657 is an apocalyptic number.

It is an amenable number.

628832657 is a deficient number, since it is larger than the sum of its proper divisors (1751983).

628832657 is a wasteful number, since it uses less digits than its factorization.

628832657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751982.

The product of its digits is 967680, while the sum is 47.

The square root of 628832657 is about 25076.5359848604. The cubic root of 628832657 is about 856.7320800900.

The spelling of 628832657 in words is "six hundred twenty-eight million, eight hundred thirty-two thousand, six hundred fifty-seven".