400864814 has 12 divisors (see below), whose sum is σ = 687325272. Its totient is φ = 171767100.

The previous prime is 400864801. The next prime is 400864829. The reversal of 400864814 is 418468004.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 72239 + ... + 77589.

It is an arithmetic number, because the mean of its divisors is an integer number (57277106).

Almost surely, 2^400864814 is an apocalyptic number.

400864814 is a deficient number, since it is larger than the sum of its proper divisors (286460458).

400864814 is an frugal number, since it uses more digits than its factorization.

400864814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10711 (or 5360 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 400864814 is about 20021.6086766274. The cubic root of 400864814 is about 737.3369178427.

The spelling of 400864814 in words is "four hundred million, eight hundred sixty-four thousand, eight hundred fourteen".