40079731 has 8 divisors (see below), whose sum is σ = 42043680. Its totient is φ = 38134272.

The previous prime is 40079723. The next prime is 40079737. The reversal of 40079731 is 13797004.

40079731 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 40079731 - 2³ = 40079723 is a prime.

It is a super-2 number, since 2×40079731² = 3212769674064722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40079693 and 40079702.

It is not an unprimeable number, because it can be changed into a prime (40079737) 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, 76 + ... + 8953.

It is an arithmetic number, because the mean of its divisors is an integer number (5255460).

Almost surely, 2^40079731 is an apocalyptic number.

40079731 is a deficient number, since it is larger than the sum of its proper divisors (1963949).

40079731 is a wasteful number, since it uses less digits than its factorization.

40079731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9245.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 40079731 is about 6330.8554714193. The cubic root of 40079731 is about 342.2222686786. Note that the first 4 decimals are identical.

The spelling of 40079731 in words is "forty million, seventy-nine thousand, seven hundred thirty-one".