400864312 has 8 divisors (see below), whose sum is σ = 751620600. Its totient is φ = 200432152.

The previous prime is 400864297. The next prime is 400864351. The reversal of 400864312 is 213468004.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-5 number, since 5×400864312⁵ (a number of 44 digits) contains 55555 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25054012 + ... + 25054027.

It is an arithmetic number, because the mean of its divisors is an integer number (93952575).

Almost surely, 2^400864312 is an apocalyptic number.

It is an amenable number.

400864312 is a deficient number, since it is larger than the sum of its proper divisors (350756288).

400864312 is a wasteful number, since it uses less digits than its factorization.

400864312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50108045 (or 50108041 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 400864312 is about 20021.5961401682. The cubic root of 400864312 is about 737.3366100554.

The spelling of 400864312 in words is "four hundred million, eight hundred sixty-four thousand, three hundred twelve".