40409931 has 8 divisors (see below), whose sum is σ = 54273744. Its totient is φ = 26743040.

The previous prime is 40409921. The next prime is 40409959. The reversal of 40409931 is 13990404.

40409931 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 40409931 - 2¹¹ = 40407883 is a prime.

It is a super-2 number, since 2×40409931² = 3265925046849522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40409921) 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, 48750 + ... + 49571.

It is an arithmetic number, because the mean of its divisors is an integer number (6784218).

Almost surely, 2^40409931 is an apocalyptic number.

40409931 is a deficient number, since it is larger than the sum of its proper divisors (13863813).

40409931 is a wasteful number, since it uses less digits than its factorization.

40409931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98461.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 40409931 is about 6356.8806029373. The cubic root of 40409931 is about 343.1595078449.

The spelling of 40409931 in words is "forty million, four hundred nine thousand, nine hundred thirty-one".