401032240 has 80 divisors (see below), whose sum is σ = 1121713920. Its totient is φ = 130256640.

The previous prime is 401032223. The next prime is 401032249. The reversal of 401032240 is 42230104.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (401032249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8206 + ... + 29485.

It is an arithmetic number, because the mean of its divisors is an integer number (14021424).

Almost surely, 2^401032240 is an apocalyptic number.

401032240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401032240 is an abundant number, since it is smaller than the sum of its proper divisors (720681680).

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

401032240 is a wasteful number, since it uses less digits than its factorization.

401032240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37730 (or 37724 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 401032240 is about 20025.7893727064. The cubic root of 401032240 is about 737.4395560920.

Adding to 401032240 its reverse (42230104), we get a palindrome (443262344).

The spelling of 401032240 in words is "four hundred one million, thirty-two thousand, two hundred forty".