400534004 has 48 divisors (see below), whose sum is σ = 771474816. Its totient is φ = 180835200.

The previous prime is 400533979. The next prime is 400534007. The reversal of 400534004 is 400435004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400534007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579299 + ... + 579989.

It is an arithmetic number, because the mean of its divisors is an integer number (16072392).

Almost surely, 2^400534004 is an apocalyptic number.

It is an amenable number.

400534004 is a deficient number, since it is larger than the sum of its proper divisors (370940812).

400534004 is a wasteful number, since it uses less digits than its factorization.

400534004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 400534004 is about 20013.3456473424. The cubic root of 400534004 is about 737.1340351873.

Adding to 400534004 its reverse (400435004), we get a palindrome (800969008).

The spelling of 400534004 in words is "four hundred million, five hundred thirty-four thousand, four".