400320501140 has 96 divisors (see below), whose sum is σ = 1055307294720. Its totient is φ = 124375464576.

The previous prime is 400320501059. The next prime is 400320501149. The reversal of 400320501140 is 41105023004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400320501149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3210482 + ... + 3332841.

It is an arithmetic number, because the mean of its divisors is an integer number (10992784320).

Almost surely, 2^400320501140 is an apocalyptic number.

It is an amenable number.

400320501140 is an abundant number, since it is smaller than the sum of its proper divisors (654986793580).

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

400320501140 is a wasteful number, since it uses less digits than its factorization.

400320501140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543381 (or 6543379 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 400320501140 its reverse (41105023004), we get a palindrome (441425524144).

The spelling of 400320501140 in words is "four hundred billion, three hundred twenty million, five hundred one thousand, one hundred forty".