39999995 has 16 divisors (see below), whose sum is σ = 55142400. Its totient is φ = 27285984.

The previous prime is 39999983. The next prime is 40000003. The reversal of 39999995 is 59999993.

It is a cyclic number.

It is not a de Polignac number, because 39999995 - 2⁴ = 39999979 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4094 + ... + 9836.

It is an arithmetic number, because the mean of its divisors is an integer number (3446400).

Almost surely, 2^39999995 is an apocalyptic number.

39999995 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

39999995 is a deficient number, since it is larger than the sum of its proper divisors (15142405).

39999995 is a wasteful number, since it uses less digits than its factorization.

39999995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5954.

The product of its digits is 7971615, while the sum is 62.

The square root of 39999995 is about 6324.5549250520. The cubic root of 39999995 is about 341.9951750855.

It can be divided in two parts, 3999999 and 5, that added together give a palindrome (4000004).

The spelling of 39999995 in words is "thirty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-five".