400628 has 12 divisors (see below), whose sum is σ = 716352. Its totient is φ = 195960.

The previous prime is 400619. The next prime is 400643. The reversal of 400628 is 826004.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

400628 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (59696).

2⁴⁰⁰⁶²⁸ is an apocalyptic number.

It is an amenable number.

400628 is a deficient number, since it is larger than the sum of its proper divisors (315724).

400628 is a wasteful number, since it uses less digits than its factorization.

400628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182 (or 2180 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 400628 is about 632.9518149117. The cubic root of 400628 is about 73.7191693406.

The spelling of 400628 in words is "four hundred thousand, six hundred twenty-eight".