400815802 has 24 divisors (see below), whose sum is σ = 648325728. Its totient is φ = 185490360.

The previous prime is 400815791. The next prime is 400815809. The reversal of 400815802 is 208518004.

It is not an unprimeable number, because it can be changed into a prime (400815809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39673 + ... + 48739.

It is an arithmetic number, because the mean of its divisors is an integer number (27013572).

Almost surely, 2^400815802 is an apocalyptic number.

400815802 is a deficient number, since it is larger than the sum of its proper divisors (247509926).

400815802 is a wasteful number, since it uses less digits than its factorization.

400815802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9154 (or 9123 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 400815802 is about 20020.3846616392. The cubic root of 400815802 is about 737.3068662903.

The spelling of 400815802 in words is "four hundred million, eight hundred fifteen thousand, eight hundred two".