400400396790 has 16 divisors (see below), whose sum is σ = 960960952368. Its totient is φ = 106773439136.

The previous prime is 400400396783. The next prime is 400400396801. The reversal of 400400396790 is 97693004004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6673339917 + ... + 6673339976.

It is an arithmetic number, because the mean of its divisors is an integer number (60060059523).

Almost surely, 2^400400396790 is an apocalyptic number.

400400396790 is an abundant number, since it is smaller than the sum of its proper divisors (560560555578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400400396790 is a wasteful number, since it uses less digits than its factorization.

400400396790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13346679903.

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 400400396790 in words is "four hundred billion, four hundred million, three hundred ninety-six thousand, seven hundred ninety".