401890624 has 14 divisors (see below), whose sum is σ = 797501834. Its totient is φ = 200945280.

The previous prime is 401890597. The next prime is 401890637. The reversal of 401890624 is 426098104.

It can be written as a sum of positive squares in only one way, i.e., 325153024 + 76737600 = 18032^2 + 8760^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 401890624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3139707 + ... + 3139834.

Almost surely, 2^401890624 is an apocalyptic number.

It is an amenable number.

401890624 is a deficient number, since it is larger than the sum of its proper divisors (395611210).

401890624 is an equidigital number, since it uses as much as digits as its factorization.

401890624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6279553 (or 6279543 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 401890624 is about 20047.2098806792. The cubic root of 401890624 is about 737.9653286297.

The spelling of 401890624 in words is "four hundred one million, eight hundred ninety thousand, six hundred twenty-four".