40131403440 has 40 divisors (see below), whose sum is σ = 124407351408. Its totient is φ = 10701707520.

The previous prime is 40131403363. The next prime is 40131403453. The reversal of 40131403440 is 4430413104.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×40131403440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40131403440.

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, 83606851 + ... + 83607330.

Almost surely, 2^40131403440 is an apocalyptic number.

40131403440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40131403440 is an abundant number, since it is smaller than the sum of its proper divisors (84275947968).

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

40131403440 is a wasteful number, since it uses less digits than its factorization.

40131403440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167214197 (or 167214191 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 40131403440 its reverse (4430413104), we get a palindrome (44561816544).

The spelling of 40131403440 in words is "forty billion, one hundred thirty-one million, four hundred three thousand, four hundred forty".