401856624 has 60 divisors (see below), whose sum is σ = 1211156856. Its totient is φ = 123647616.

The previous prime is 401856619. The next prime is 401856641. The reversal of 401856624 is 426658104.

It is a super-2 number, since 2×401856624² = 322977492505354752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 105462 + ... + 109205.

Almost surely, 2^401856624 is an apocalyptic number.

It is an amenable number.

401856624 is an abundant number, since it is smaller than the sum of its proper divisors (809300232).

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

401856624 is a wasteful number, since it uses less digits than its factorization.

401856624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214694 (or 214685 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 401856624 is about 20046.3618644381. The cubic root of 401856624 is about 737.9445173880.

The spelling of 401856624 in words is "four hundred one million, eight hundred fifty-six thousand, six hundred twenty-four".