628957 has 8 divisors (see below), whose sum is σ = 756800. Its totient is φ = 510624.

The previous prime is 628939. The next prime is 628973. The reversal of 628957 is 759826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2232 + ... + 2497.

It is an arithmetic number, because the mean of its divisors is an integer number (94600).

2⁶²⁸⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

628957 is a deficient number, since it is larger than the sum of its proper divisors (127843).

628957 is a wasteful number, since it uses less digits than its factorization.

628957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755.

The product of its digits is 30240, while the sum is 37.

The square root of 628957 is about 793.0680929151. The cubic root of 628957 is about 85.6788545359.

The spelling of 628957 in words is "six hundred twenty-eight thousand, nine hundred fifty-seven".