400122564 has 12 divisors (see below), whose sum is σ = 933619344. Its totient is φ = 133374184.

The previous prime is 400122533. The next prime is 400122581. The reversal of 400122564 is 465221004.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16671762 + ... + 16671785.

It is an arithmetic number, because the mean of its divisors is an integer number (77801612).

Almost surely, 2^400122564 is an apocalyptic number.

It is an amenable number.

400122564 is an abundant number, since it is smaller than the sum of its proper divisors (533496780).

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

400122564 is a wasteful number, since it uses less digits than its factorization.

400122564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33343554 (or 33343552 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 400122564 is about 20003.0638653182. The cubic root of 400122564 is about 736.8815469825.

Adding to 400122564 its reverse (465221004), we get a palindrome (865343568).

It can be divided in two parts, 4001 and 22564, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 400122564 in words is "four hundred million, one hundred twenty-two thousand, five hundred sixty-four".