7440404392431 has 28 divisors (see below), whose sum is σ = 11155746095208. Its totient is φ = 4960161695664.

The previous prime is 7440404392411. The next prime is 7440404392441. The reversal of 7440404392431 is 1342934040447.

7440404392431 is a `hidden beast` number, since 7 + 440 + 40 + 43 + 92 + 43 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-7440404392431 is a prime.

It is a super-2 number, since 2×7440404392431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7440404392411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 47308681 + ... + 47465693.

Almost surely, 2^{7440404392431} is an apocalyptic number.

7440404392431 is a deficient number, since it is larger than the sum of its proper divisors (3715341702777).

7440404392431 is an equidigital number, since it uses as much as digits as its factorization.

7440404392431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222034 (or 222019 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 45.

The spelling of 7440404392431 in words is "seven trillion, four hundred forty billion, four hundred four million, three hundred ninety-two thousand, four hundred thirty-one".