628870 has 16 divisors (see below), whose sum is σ = 1235088. Its totient is φ = 228640.

The previous prime is 628861. The next prime is 628877. The reversal of 628870 is 78826.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628877) 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, 2749 + ... + 2968.

It is an arithmetic number, because the mean of its divisors is an integer number (77193).

2⁶²⁸⁸⁷⁰ is an apocalyptic number.

628870 is a deficient number, since it is larger than the sum of its proper divisors (606218).

628870 is a wasteful number, since it uses less digits than its factorization.

628870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 628870 is about 793.0132407470. The cubic root of 628870 is about 85.6749038663.

The spelling of 628870 in words is "six hundred twenty-eight thousand, eight hundred seventy".