400375228 has 48 divisors (see below), whose sum is σ = 813038688. Its totient is φ = 170496000.

The previous prime is 400375181. The next prime is 400375249. The reversal of 400375228 is 822573004.

It is a self number, because there is not a number n which added to its sum of digits gives 400375228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179158 + ... + 181378.

It is an arithmetic number, because the mean of its divisors is an integer number (16938306).

Almost surely, 2^400375228 is an apocalyptic number.

It is an amenable number.

400375228 is an abundant number, since it is smaller than the sum of its proper divisors (412663460).

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

400375228 is a wasteful number, since it uses less digits than its factorization.

400375228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494 (or 2492 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 400375228 is about 20009.3785010929. The cubic root of 400375228 is about 737.0366196862.

The spelling of 400375228 in words is "four hundred million, three hundred seventy-five thousand, two hundred twenty-eight".