400124356 has 6 divisors (see below), whose sum is σ = 700217630. Its totient is φ = 200062176.

The previous prime is 400124341. The next prime is 400124357. The reversal of 400124356 is 653421004.

It can be written as a sum of positive squares in only one way, i.e., 229037956 + 171086400 = 15134^2 + 13080^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400124356.

It is not an unprimeable number, because it can be changed into a prime (400124357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50015541 + ... + 50015548.

Almost surely, 2^400124356 is an apocalyptic number.

It is an amenable number.

400124356 is a deficient number, since it is larger than the sum of its proper divisors (300093274).

400124356 is a wasteful number, since it uses less digits than its factorization.

400124356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100031093 (or 100031091 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 400124356 is about 20003.1086584061. The cubic root of 400124356 is about 736.8826470536.

The spelling of 400124356 in words is "four hundred million, one hundred twenty-four thousand, three hundred fifty-six".