400220244 has 48 divisors (see below), whose sum is σ = 1038710400. Its totient is φ = 133265088.

The previous prime is 400220209. The next prime is 400220281. The reversal of 400220244 is 442022004.

400220244 is a `hidden beast` number, since 400 + 2 + 20 + 244 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167184 + ... + 169560.

It is an arithmetic number, because the mean of its divisors is an integer number (21639800).

Almost surely, 2^400220244 is an apocalyptic number.

It is an amenable number.

400220244 is an abundant number, since it is smaller than the sum of its proper divisors (638490156).

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

400220244 is a wasteful number, since it uses less digits than its factorization.

400220244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949 (or 3941 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 400220244 is about 20005.5053422802. The cubic root of 400220244 is about 736.9415058881.

Adding to 400220244 its reverse (442022004), we get a palindrome (842242248).

The spelling of 400220244 in words is "four hundred million, two hundred twenty thousand, two hundred forty-four".