401909190 has 32 divisors (see below), whose sum is σ = 965454336. Its totient is φ = 107078880.

The previous prime is 401909177. The next prime is 401909191. The reversal of 401909190 is 91909104.

It is a super-2 number, since 2×401909190² = 323061994012912200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401909191) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31489 + ... + 42371.

It is an arithmetic number, because the mean of its divisors is an integer number (30170448).

Almost surely, 2^401909190 is an apocalyptic number.

401909190 is an abundant number, since it is smaller than the sum of its proper divisors (563545146).

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

401909190 is a wasteful number, since it uses less digits than its factorization.

401909190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12124.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 401909190 is about 20047.6729322882. The cubic root of 401909190 is about 737.9766922964.

The spelling of 401909190 in words is "four hundred one million, nine hundred nine thousand, one hundred ninety".