401890626 has 32 divisors (see below), whose sum is σ = 909947520. Its totient is φ = 131434992.

The previous prime is 401890597. The next prime is 401890637. The reversal of 401890626 is 626098104.

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, 67350 + ... + 73073.

It is an arithmetic number, because the mean of its divisors is an integer number (28435860).

Almost surely, 2^401890626 is an apocalyptic number.

401890626 is an abundant number, since it is smaller than the sum of its proper divisors (508056894).

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

401890626 is a wasteful number, since it uses less digits than its factorization.

401890626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140487 (or 140481 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 401890626 is about 20047.2099305614. The cubic root of 401890626 is about 737.9653298539.

The spelling of 401890626 in words is "four hundred one million, eight hundred ninety thousand, six hundred twenty-six".