628793657 has 4 divisors (see below), whose sum is σ = 661888080. Its totient is φ = 595699236.

The previous prime is 628793653. The next prime is 628793713. The reversal of 628793657 is 756397826.

628793657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 628793657 - 2² = 628793653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628793599 and 628793608.

It is not an unprimeable number, because it can be changed into a prime (628793653) 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, 16547183 + ... + 16547220.

It is an arithmetic number, because the mean of its divisors is an integer number (165472020).

Almost surely, 2^628793657 is an apocalyptic number.

It is an amenable number.

628793657 is a deficient number, since it is larger than the sum of its proper divisors (33094423).

628793657 is a wasteful number, since it uses less digits than its factorization.

628793657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33094422.

The product of its digits is 3810240, while the sum is 53.

The square root of 628793657 is about 25075.7583534377. The cubic root of 628793657 is about 856.7143683074.

The spelling of 628793657 in words is "six hundred twenty-eight million, seven hundred ninety-three thousand, six hundred fifty-seven".