400278044322 has 54 divisors (see below), whose sum is σ = 939195748881. Its totient is φ = 123151738320.

The previous prime is 400278044317. The next prime is 400278044381. The reversal of 400278044322 is 223440872004.

It can be written as a sum of positive squares in 2 ways, for example, as 342249570441 + 58028473881 = 585021^2 + 240891^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=447369.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 34889047 + ... + 34900517.

Almost surely, 2^400278044322 is an apocalyptic number.

400278044322 is an abundant number, since it is smaller than the sum of its proper divisors (538917704559).

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

400278044322 is an equidigital number, since it uses as much as digits as its factorization.

400278044322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22976 (or 11489 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 36.

The spelling of 400278044322 in words is "four hundred billion, two hundred seventy-eight million, forty-four thousand, three hundred twenty-two".