40000079 has 16 divisors (see below), whose sum is σ = 46931520. Its totient is φ = 33384960.

The previous prime is 40000061. The next prime is 40000123. The reversal of 40000079 is 97000004.

40000079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40000079 - 2⁸ = 39999823 is a prime.

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 40000079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000579) 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 15 ways as a sum of consecutive naturals, for example, 47837 + ... + 48665.

It is an arithmetic number, because the mean of its divisors is an integer number (2933220).

Almost surely, 2^40000079 is an apocalyptic number.

40000079 is a deficient number, since it is larger than the sum of its proper divisors (6931441).

40000079 is a wasteful number, since it uses less digits than its factorization.

40000079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 40000079 is about 6324.5615658321. The cubic root of 40000079 is about 341.9954144820.

It can be divided in two parts, 4000007 and 9, that multiplied together give a palindrome (36000063).

The spelling of 40000079 in words is "forty million, seventy-nine", and thus it is an aban number and an uban number.