401140520 has 32 divisors (see below), whose sum is σ = 984618720. Its totient is φ = 145869120.

The previous prime is 401140511. The next prime is 401140541. The reversal of 401140520 is 25041104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455402 + ... + 456281.

It is an arithmetic number, because the mean of its divisors is an integer number (30769335).

Almost surely, 2^401140520 is an apocalyptic number.

401140520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401140520 is an abundant number, since it is smaller than the sum of its proper divisors (583478200).

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

401140520 is a wasteful number, since it uses less digits than its factorization.

401140520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911705 (or 911701 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 401140520 is about 20028.4927041453. The cubic root of 401140520 is about 737.5059204734.

Adding to 401140520 its reverse (25041104), we get a palindrome (426181624).

The spelling of 401140520 in words is "four hundred one million, one hundred forty thousand, five hundred twenty".