4000431042 has 96 divisors (see below), whose sum is σ = 9193953600. Its totient is φ = 1255250304.

The previous prime is 4000431023. The next prime is 4000431047. The reversal of 4000431042 is 2401340004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (4000431047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3741684 + ... + 3742752.

It is an arithmetic number, because the mean of its divisors is an integer number (95770350).

Almost surely, 2^4000431042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4000431042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4596976800).

4000431042 is an abundant number, since it is smaller than the sum of its proper divisors (5193522558).

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

4000431042 is a wasteful number, since it uses less digits than its factorization.

4000431042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1277 counting only the distinct ones).

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

The square root of 4000431042 is about 63248.9607977870. The cubic root of 4000431042 is about 1587.4580696305.

Adding to 4000431042 its reverse (2401340004), we get a palindrome (6401771046).

The spelling of 4000431042 in words is "four billion, four hundred thirty-one thousand, forty-two".