39990511 has 16 divisors (see below), whose sum is σ = 46794240. Its totient is φ = 33770880.

The previous prime is 39990487. The next prime is 39990521. The reversal of 39990511 is 11509993.

It is a de Polignac number, because none of the positive numbers 2^k-39990511 is a prime.

It is a super-2 number, since 2×39990511² = 3198481940082242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39990521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13420 + ... + 16126.

It is an arithmetic number, because the mean of its divisors is an integer number (2924640).

Almost surely, 2^39990511 is an apocalyptic number.

39990511 is a deficient number, since it is larger than the sum of its proper divisors (6803729).

39990511 is a wasteful number, since it uses less digits than its factorization.

39990511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814.

The product of its (nonzero) digits is 10935, while the sum is 37.

The square root of 39990511 is about 6323.8051045237. The cubic root of 39990511 is about 341.9681439270.

The spelling of 39990511 in words is "thirty-nine million, nine hundred ninety thousand, five hundred eleven".