400864311 has 12 divisors (see below), whose sum is σ = 579882888. Its totient is φ = 266847504.

The previous prime is 400864297. The next prime is 400864351. The reversal of 400864311 is 113468004.

400864311 is a `hidden beast` number, since 4 + 0 + 0 + 8 + 643 + 11 = 666.

It is not a de Polignac number, because 400864311 - 2⁵ = 400864279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400864351) 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 11 ways as a sum of consecutive naturals, for example, 26460 + ... + 38753.

It is an arithmetic number, because the mean of its divisors is an integer number (48323574).

Almost surely, 2^400864311 is an apocalyptic number.

400864311 is a deficient number, since it is larger than the sum of its proper divisors (179018577).

400864311 is a wasteful number, since it uses less digits than its factorization.

400864311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65902 (or 65899 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 400864311 is about 20021.5961151952. The cubic root of 400864311 is about 737.3366094423.

The spelling of 400864311 in words is "four hundred million, eight hundred sixty-four thousand, three hundred eleven".