400379004 has 24 divisors (see below), whose sum is σ = 1038019920. Its totient is φ = 133459632.

The previous prime is 400379003. The next prime is 400379027. The reversal of 400379004 is 400973004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400379003) 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, 1853499 + ... + 1853714.

It is an arithmetic number, because the mean of its divisors is an integer number (43250830).

Almost surely, 2^400379004 is an apocalyptic number.

It is an amenable number.

400379004 is an abundant number, since it is smaller than the sum of its proper divisors (637640916).

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

400379004 is a wasteful number, since it uses less digits than its factorization.

400379004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707226 (or 3707218 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 400379004 is about 20009.4728566247. The cubic root of 400379004 is about 737.0389367139.

The spelling of 400379004 in words is "four hundred million, three hundred seventy-nine thousand, four".