401921190 has 160 divisors (see below), whose sum is σ = 1195983360. Its totient is φ = 96033600.

The previous prime is 401921189. The next prime is 401921197. The reversal of 401921190 is 91129104.

It is a super-2 number, since 2×401921190² = 323081285942032200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401921197) 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 79 ways as a sum of consecutive naturals, for example, 703605 + ... + 704175.

It is an arithmetic number, because the mean of its divisors is an integer number (7474896).

Almost surely, 2^401921190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401921190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597991680).

401921190 is an abundant number, since it is smaller than the sum of its proper divisors (794062170).

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

401921190 is a wasteful number, since it uses less digits than its factorization.

401921190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 401921190 is about 20047.9722166607. The cubic root of 401921190 is about 737.9840369341.

The spelling of 401921190 in words is "four hundred one million, nine hundred twenty-one thousand, one hundred ninety".