628257 has 8 divisors (see below), whose sum is σ = 957376. Its totient is φ = 358992.

The previous prime is 628231. The next prime is 628261. The reversal of 628257 is 752826.

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

It is not a de Polignac number, because 628257 - 2⁶ = 628193 is a prime.

628257 is a lucky number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628257.

It is not an unprimeable number, because it can be changed into a prime (628207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14938 + ... + 14979.

It is an arithmetic number, because the mean of its divisors is an integer number (119672).

2⁶²⁸²⁵⁷ is an apocalyptic number.

It is an amenable number.

628257 is a deficient number, since it is larger than the sum of its proper divisors (329119).

628257 is a wasteful number, since it uses less digits than its factorization.

628257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29927.

The product of its digits is 6720, while the sum is 30.

The square root of 628257 is about 792.6266460320. The cubic root of 628257 is about 85.6470572049.

The spelling of 628257 in words is "six hundred twenty-eight thousand, two hundred fifty-seven".