40494731 has 8 divisors (see below), whose sum is σ = 43187760. Its totient is φ = 37836288.

The previous prime is 40494721. The next prime is 40494737. The reversal of 40494731 is 13749404.

It is a happy number.

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

It is not a de Polignac number, because 40494731 - 2¹⁰ = 40493707 is a prime.

It is a super-2 number, since 2×40494731² = 3279646477524722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40494737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6206 + ... + 10931.

It is an arithmetic number, because the mean of its divisors is an integer number (5398470).

Almost surely, 2^40494731 is an apocalyptic number.

40494731 is a deficient number, since it is larger than the sum of its proper divisors (2693029).

40494731 is a wasteful number, since it uses less digits than its factorization.

40494731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17293.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40494731 is about 6363.5470454771. The cubic root of 40494731 is about 343.3993795291.

The spelling of 40494731 in words is "forty million, four hundred ninety-four thousand, seven hundred thirty-one".