40403131440 has 80 divisors (see below), whose sum is σ = 143142528768. Its totient is φ = 9235001088.

The previous prime is 40403131423. The next prime is 40403131453. The reversal of 40403131440 is 4413130404.

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 (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40403131440.

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, 12023062 + ... + 12026421.

Almost surely, 2^40403131440 is an apocalyptic number.

40403131440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40403131440 is an abundant number, since it is smaller than the sum of its proper divisors (102739397328).

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

40403131440 is a wasteful number, since it uses less digits than its factorization.

40403131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24049506 (or 24049500 counting only the distinct ones).

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

Adding to 40403131440 its reverse (4413130404), we get a palindrome (44816261844).

The spelling of 40403131440 in words is "forty billion, four hundred three million, one hundred thirty-one thousand, four hundred forty".