400818452 has 24 divisors (see below), whose sum is σ = 781784640. Its totient is φ = 178692480.

The previous prime is 400818449. The next prime is 400818479. The reversal of 400818452 is 254818004.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153824 + ... + 156407.

It is an arithmetic number, because the mean of its divisors is an integer number (32574360).

Almost surely, 2^400818452 is an apocalyptic number.

It is an amenable number.

400818452 is a deficient number, since it is larger than the sum of its proper divisors (380966188).

400818452 is a wasteful number, since it uses less digits than its factorization.

400818452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310271 (or 310269 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 400818452 is about 20020.4508440744. The cubic root of 400818452 is about 737.3084911920.

The spelling of 400818452 in words is "four hundred million, eight hundred eighteen thousand, four hundred fifty-two".