400304004 has 24 divisors (see below), whose sum is σ = 934600128. Its totient is φ = 133355040.

The previous prime is 400303997. The next prime is 400304017. The reversal of 400304004 is 400403004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13134 + ... + 31194.

It is an arithmetic number, because the mean of its divisors is an integer number (38941672).

Almost surely, 2^400304004 is an apocalyptic number.

It is an amenable number.

400304004 is an abundant number, since it is smaller than the sum of its proper divisors (534296124).

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

400304004 is a wasteful number, since it uses less digits than its factorization.

400304004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19915 (or 19913 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400304004 is about 20007.5986565105. The cubic root of 400304004 is about 736.9929125122.

Adding to 400304004 its reverse (400403004), we get a palindrome (800707008).

The spelling of 400304004 in words is "four hundred million, three hundred four thousand, four".