401400522 has 28 divisors (see below), whose sum is σ = 902741490. Its totient is φ = 133799688.

The previous prime is 401400511. The next prime is 401400553. The reversal of 401400522 is 225004104.

401400522 is a `hidden beast` number, since 4 + 0 + 140 + 0 + 522 = 666.

It can be written as a sum of positive squares in only one way, i.e., 381069441 + 20331081 = 19521^2 + 4509^2 .

It is a super-2 number, since 2×401400522² = 322244758123744968, which contains 22 as substring.

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 = 401400495 and 401400504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 136197 + ... + 139112.

Almost surely, 2^401400522 is an apocalyptic number.

401400522 is an abundant number, since it is smaller than the sum of its proper divisors (501340968).

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

401400522 is an equidigital number, since it uses as much as digits as its factorization.

401400522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275329 (or 275314 counting only the distinct ones).

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

The square root of 401400522 is about 20034.9824556948. The cubic root of 401400522 is about 737.6652259129.

Adding to 401400522 its reverse (225004104), we get a palindrome (626404626).

The spelling of 401400522 in words is "four hundred one million, four hundred thousand, five hundred twenty-two".