39929885 has 8 divisors (see below), whose sum is σ = 48086880. Its totient is φ = 31829904.

The previous prime is 39929881. The next prime is 39929899. The reversal of 39929885 is 58892993.

It is a happy number.

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 39929885 - 2² = 39929881 is a prime.

It is a super-2 number, since 2×39929885² = 3188791432226450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39929881) 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, 12695 + ... + 15524.

It is an arithmetic number, because the mean of its divisors is an integer number (6010860).

Almost surely, 2^39929885 is an apocalyptic number.

It is an amenable number.

39929885 is a deficient number, since it is larger than the sum of its proper divisors (8156995).

39929885 is a wasteful number, since it uses less digits than its factorization.

39929885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28507.

The product of its digits is 1399680, while the sum is 53.

The square root of 39929885 is about 6319.0098116714. The cubic root of 39929885 is about 341.7952475263.

It can be divided in two parts, 3992988 and 5, that added together give a palindrome (3992993).

The spelling of 39929885 in words is "thirty-nine million, nine hundred twenty-nine thousand, eight hundred eighty-five".