628673957 has 16 divisors (see below), whose sum is σ = 705853440. Its totient is φ = 556420608.

The previous prime is 628673953. The next prime is 628673963. The reversal of 628673957 is 759376826.

It is not a de Polignac number, because 628673957 - 2² = 628673953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628673899 and 628673908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628673953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37148 + ... + 51354.

It is an arithmetic number, because the mean of its divisors is an integer number (44115840).

Almost surely, 2^628673957 is an apocalyptic number.

It is an amenable number.

628673957 is a deficient number, since it is larger than the sum of its proper divisors (77179483).

628673957 is a wasteful number, since it uses less digits than its factorization.

628673957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14380.

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

The square root of 628673957 is about 25073.3714725403. The cubic root of 628673957 is about 856.6600021855.

The spelling of 628673957 in words is "six hundred twenty-eight million, six hundred seventy-three thousand, nine hundred fifty-seven".