400370004 has 18 divisors (see below), whose sum is σ = 1012046490. Its totient is φ = 133456656.

The previous prime is 400369999. The next prime is 400370011. The reversal of 400370004 is 400073004.

It can be written as a sum of positive squares in only one way, i.e., 251285904 + 149084100 = 15852^2 + 12210^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×400370004² = 320592280205920032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5560659 + ... + 5560730.

It is an arithmetic number, because the mean of its divisors is an integer number (56224805).

Almost surely, 2^400370004 is an apocalyptic number.

It is an amenable number.

400370004 is an abundant number, since it is smaller than the sum of its proper divisors (611676486).

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

400370004 is a wasteful number, since it uses less digits than its factorization.

400370004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11121399 (or 11121394 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 400370004 is about 20009.2479618800. The cubic root of 400370004 is about 737.0334141132.

The spelling of 400370004 in words is "four hundred million, three hundred seventy thousand, four".