400478490722 has 6 divisors (see below), whose sum is σ = 600719078529. Its totient is φ = 200238797880.

The previous prime is 400478490703. The next prime is 400478490749. The reversal of 400478490722 is 227094874004.

It can be written as a sum of positive squares in 2 ways, for example, as 322168624801 + 78309865921 = 567599^2 + 279839^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=447481.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 671222 + ... + 1118702.

Almost surely, 2^400478490722 is an apocalyptic number.

400478490722 is a deficient number, since it is larger than the sum of its proper divisors (200240587807).

400478490722 is an frugal number, since it uses more digits than its factorization.

400478490722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894964 (or 447483 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 400478490722 in words is "four hundred billion, four hundred seventy-eight million, four hundred ninety thousand, seven hundred twenty-two".