400331004 has 12 divisors (see below), whose sum is σ = 934105704. Its totient is φ = 133443664.

The previous prime is 400330979. The next prime is 400331021. The reversal of 400331004 is 400133004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16680447 + ... + 16680470.

It is an arithmetic number, because the mean of its divisors is an integer number (77842142).

Almost surely, 2^400331004 is an apocalyptic number.

It is an amenable number.

400331004 is an abundant number, since it is smaller than the sum of its proper divisors (533774700).

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

400331004 is a wasteful number, since it uses less digits than its factorization.

400331004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33360924 (or 33360922 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 400331004 is about 20008.2733887760. The cubic root of 400331004 is about 737.0094818870.

Adding to 400331004 its reverse (400133004), we get a palindrome (800464008).

The spelling of 400331004 in words is "four hundred million, three hundred thirty-one thousand, four".