400504122 has 32 divisors (see below), whose sum is σ = 942364800. Its totient is φ = 125648064.

The previous prime is 400504121. The next prime is 400504127. The reversal of 400504122 is 221405004.

400504122 is a `hidden beast` number, since 40 + 0 + 504 + 122 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 400504095 and 400504104.

It is not an unprimeable number, because it can be changed into a prime (400504121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217222 + ... + 219057.

It is an arithmetic number, because the mean of its divisors is an integer number (29448900).

Almost surely, 2^400504122 is an apocalyptic number.

400504122 is an abundant number, since it is smaller than the sum of its proper divisors (541860678).

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

400504122 is a wasteful number, since it uses less digits than its factorization.

400504122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436307 (or 436301 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 400504122 is about 20012.5990815786. The cubic root of 400504122 is about 737.1157033380.

Adding to 400504122 its reverse (221405004), we get a palindrome (621909126).

The spelling of 400504122 in words is "four hundred million, five hundred four thousand, one hundred twenty-two".