40499931 has 8 divisors (see below), whose sum is σ = 54495760. Its totient is φ = 26752032.

The previous prime is 40499917. The next prime is 40499939. The reversal of 40499931 is 13999404.

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

It is not a de Polignac number, because 40499931 - 2⁹ = 40499419 is a prime.

It is a super-2 number, since 2×40499931² = 3280488822009522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40499931.

It is not an unprimeable number, because it can be changed into a prime (40499939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61600 + ... + 62253.

It is an arithmetic number, because the mean of its divisors is an integer number (6811970).

Almost surely, 2^40499931 is an apocalyptic number.

40499931 is a deficient number, since it is larger than the sum of its proper divisors (13995829).

40499931 is a wasteful number, since it uses less digits than its factorization.

40499931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123965.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 40499931 is about 6363.9556095246. The cubic root of 40499931 is about 343.4140777405.

The spelling of 40499931 in words is "forty million, four hundred ninety-nine thousand, nine hundred thirty-one".