400507704 has 24 divisors (see below), whose sum is σ = 1084708560. Its totient is φ = 133502544.

The previous prime is 400507703. The next prime is 400507733. The reversal of 400507704 is 407705004.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400507703) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2781232 + ... + 2781375.

It is an arithmetic number, because the mean of its divisors is an integer number (45196190).

Almost surely, 2^400507704 is an apocalyptic number.

It is an amenable number.

400507704 is an abundant number, since it is smaller than the sum of its proper divisors (684200856).

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

400507704 is a wasteful number, since it uses less digits than its factorization.

400507704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562619 (or 5562612 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 400507704 is about 20012.6885750016. The cubic root of 400507704 is about 737.1179008523.

The spelling of 400507704 in words is "four hundred million, five hundred seven thousand, seven hundred four".