2400040431 has 6 divisors (see below), whose sum is σ = 3466725080. Its totient is φ = 1600026948.

The previous prime is 2400040397. The next prime is 2400040451. The reversal of 2400040431 is 1340400042.

It is not a de Polignac number, because 2400040431 - 2¹⁴ = 2400024047 is a prime.

It is a super-2 number, since 2×2400040431² = 11520388140869331522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400040451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133335571 + ... + 133335588.

Almost surely, 2^2400040431 is an apocalyptic number.

2400040431 is a deficient number, since it is larger than the sum of its proper divisors (1066684649).

2400040431 is a wasteful number, since it uses less digits than its factorization.

2400040431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266671165 (or 266671162 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2400040431 is about 48990.2075010915. The cubic root of 2400040431 is about 1338.8734184120.

Adding to 2400040431 its reverse (1340400042), we get a palindrome (3740440473).

The spelling of 2400040431 in words is "two billion, four hundred million, forty thousand, four hundred thirty-one".