40085579 has 4 divisors (see below), whose sum is σ = 40165776. Its totient is φ = 40005384.

The previous prime is 40085567. The next prime is 40085651. The reversal of 40085579 is 97558004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40085579 - 2⁸ = 40085323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40085519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39344 + ... + 40349.

It is an arithmetic number, because the mean of its divisors is an integer number (10041444).

Almost surely, 2^40085579 is an apocalyptic number.

40085579 is a deficient number, since it is larger than the sum of its proper divisors (80197).

40085579 is an equidigital number, since it uses as much as digits as its factorization.

40085579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80196.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 40085579 is about 6331.3173194842. The cubic root of 40085579 is about 342.2389123240.

The spelling of 40085579 in words is "forty million, eighty-five thousand, five hundred seventy-nine".