400242056 has 8 divisors (see below), whose sum is σ = 750453870. Its totient is φ = 200121024.

The previous prime is 400242047. The next prime is 400242071. The reversal of 400242056 is 650242004.

It can be written as a sum of positive squares in only one way, i.e., 322202500 + 78039556 = 17950^2 + 8834^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×400242056² = 320387406782214272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25015121 + ... + 25015136.

Almost surely, 2^400242056 is an apocalyptic number.

It is an amenable number.

400242056 is a deficient number, since it is larger than the sum of its proper divisors (350211814).

400242056 is a wasteful number, since it uses less digits than its factorization.

400242056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50030263 (or 50030259 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400242056 is about 20006.0504847908. The cubic root of 400242056 is about 736.9548934135.

The spelling of 400242056 in words is "four hundred million, two hundred forty-two thousand, fifty-six".