39404013 has 24 divisors (see below), whose sum is σ = 58579584. Its totient is φ = 23538240.

The previous prime is 39404009. The next prime is 39404021. The reversal of 39404013 is 31040493.

39404013 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 39404013 - 2² = 39404009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39404033) 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 23 ways as a sum of consecutive naturals, for example, 25756 + ... + 27242.

It is an arithmetic number, because the mean of its divisors is an integer number (2440816).

Almost surely, 2^39404013 is an apocalyptic number.

39404013 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

39404013 is a deficient number, since it is larger than the sum of its proper divisors (19175571).

39404013 is a wasteful number, since it uses less digits than its factorization.

39404013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585 (or 1574 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 39404013 is about 6277.2615844809. The cubic root of 39404013 is about 340.2881438543.

The spelling of 39404013 in words is "thirty-nine million, four hundred four thousand, thirteen".