401427924 has 48 divisors (see below), whose sum is σ = 983496192. Its totient is φ = 127192032.

The previous prime is 401427899. The next prime is 401427931. The reversal of 401427924 is 429724104.

It is a super-2 number, since 2×401427924² = 322288756333899552, which contains 22 as substring.

It is a congruent number.

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, 40527 + ... + 49449.

It is an arithmetic number, because the mean of its divisors is an integer number (20489504).

Almost surely, 2^401427924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401427924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491748096).

401427924 is an abundant number, since it is smaller than the sum of its proper divisors (582068268).

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

401427924 is a wasteful number, since it uses less digits than its factorization.

401427924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9116 (or 9114 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 401427924 is about 20035.6662978799. Note that the first 3 decimals coincide. The cubic root of 401427924 is about 737.6820113442.

The spelling of 401427924 in words is "four hundred one million, four hundred twenty-seven thousand, nine hundred twenty-four".