628578 has 24 divisors (see below), whose sum is σ = 1392768. Its totient is φ = 204792.

The previous prime is 628561. The next prime is 628583. The reversal of 628578 is 875826.

628578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×628578² = 790220604168, which contains 22 as substring.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (58032).

2⁶²⁸⁵⁷⁸ is an apocalyptic number.

628578 is an abundant number, since it is smaller than the sum of its proper divisors (764190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628578 is a wasteful number, since it uses less digits than its factorization.

628578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 795 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 628578 is about 792.8291114736. The cubic root of 628578 is about 85.6616414830.

The spelling of 628578 in words is "six hundred twenty-eight thousand, five hundred seventy-eight".