40431139 has 8 divisors (see below), whose sum is σ = 47190528. Its totient is φ = 33917640.

The previous prime is 40431119. The next prime is 40431199. The reversal of 40431139 is 93113404.

It is a happy number.

40431139 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 a cyclic number.

It is not a de Polignac number, because 40431139 - 2⁷ = 40431011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40431109) 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, 61117 + ... + 61774.

It is an arithmetic number, because the mean of its divisors is an integer number (5898816).

Almost surely, 2^40431139 is an apocalyptic number.

40431139 is a deficient number, since it is larger than the sum of its proper divisors (6759389).

40431139 is a wasteful number, since it uses less digits than its factorization.

40431139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122945.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 40431139 is about 6358.5484978885. The cubic root of 40431139 is about 343.2195298401.

The spelling of 40431139 in words is "forty million, four hundred thirty-one thousand, one hundred thirty-nine".