40023431 has 8 divisors (see below), whose sum is σ = 46185984. Its totient is φ = 33972120.

The previous prime is 40023419. The next prime is 40023433. The reversal of 40023431 is 13432004.

40023431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40023431 - 2¹⁴ = 40007047 is a prime.

It is a super-2 number, since 2×40023431² = 3203750058023522, 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 (40023433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27035 + ... + 28476.

It is an arithmetic number, because the mean of its divisors is an integer number (5773248).

Almost surely, 2^40023431 is an apocalyptic number.

40023431 is a deficient number, since it is larger than the sum of its proper divisors (6162553).

40023431 is a wasteful number, since it uses less digits than its factorization.

40023431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55621.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40023431 is about 6326.4074323426. The cubic root of 40023431 is about 342.0619537114.

Adding to 40023431 its reverse (13432004), we get a palindrome (53455435).

The spelling of 40023431 in words is "forty million, twenty-three thousand, four hundred thirty-one".