400039204 has 24 divisors (see below), whose sum is σ = 704636856. Its totient is φ = 198720000.

The previous prime is 400039201. The next prime is 400039267. The reversal of 400039204 is 402930004.

It can be written as a sum of positive squares in 4 ways, for example, as 124545600 + 275493604 = 11160^2 + 16598^2 .

It is not an unprimeable number, because it can be changed into a prime (400039201) 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, 739174 + ... + 739714.

It is an arithmetic number, because the mean of its divisors is an integer number (29359869).

Almost surely, 2^400039204 is an apocalyptic number.

It is an amenable number.

400039204 is a deficient number, since it is larger than the sum of its proper divisors (304597652).

400039204 is a wasteful number, since it uses less digits than its factorization.

400039204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407 (or 1405 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 400039204 is about 20000.9800759863. The cubic root of 400039204 is about 736.8303704035.

Adding to 400039204 its reverse (402930004), we get a palindrome (802969208).

The spelling of 400039204 in words is "four hundred million, thirty-nine thousand, two hundred four".