4000042431 has 72 divisors (see below), whose sum is σ = 7718256000. Its totient is φ = 1968533280.

The previous prime is 4000042399. The next prime is 4000042439. The reversal of 4000042431 is 1342400004.

It is not a de Polignac number, because 4000042431 - 2⁵ = 4000042399 is a prime.

It is a super-2 number, since 2×4000042431² = 32000678899600779522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000042439) 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 71 ways as a sum of consecutive naturals, for example, 70470 + ... + 113868.

It is an arithmetic number, because the mean of its divisors is an integer number (107198000).

Almost surely, 2^4000042431 is an apocalyptic number.

4000042431 is a deficient number, since it is larger than the sum of its proper divisors (3718213569).

4000042431 is a wasteful number, since it uses less digits than its factorization.

4000042431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43449 (or 43439 counting only the distinct ones).

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

The square root of 4000042431 is about 63245.8886489865. Note that the first 3 decimals coincide. The cubic root of 4000042431 is about 1587.4066648662.

Adding to 4000042431 its reverse (1342400004), we get a palindrome (5342442435).

The spelling of 4000042431 in words is "four billion, forty-two thousand, four hundred thirty-one".