400422444020 has 24 divisors (see below), whose sum is σ = 842159304168. Its totient is φ = 159926659200.

The previous prime is 400422444013. The next prime is 400422444031. The reversal of 400422444020 is 20444224004.

It can be written as a sum of positive squares in 4 ways, for example, as 94965050896 + 305457393124 = 308164^2 + 552682^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15131351 + ... + 15157790.

It is an arithmetic number, because the mean of its divisors is an integer number (35089971007).

Almost surely, 2^400422444020 is an apocalyptic number.

It is an amenable number.

400422444020 is an abundant number, since it is smaller than the sum of its proper divisors (441736860148).

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

400422444020 is a wasteful number, since it uses less digits than its factorization.

400422444020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30289811 (or 30289809 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 400422444020 its reverse (20444224004), we get a palindrome (420866668024).

The spelling of 400422444020 in words is "four hundred billion, four hundred twenty-two million, four hundred forty-four thousand, twenty".