39885129 has 10 divisors (see below), whose sum is σ = 59581610. Its totient is φ = 26590032.

The previous prime is 39885113. The next prime is 39885137. The reversal of 39885129 is 92158893.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28676025 + 11209104 = 5355^2 + 3348^2 .

It is not a de Polignac number, because 39885129 - 2⁴ = 39885113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39885529) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 246124 + ... + 246285.

It is an arithmetic number, because the mean of its divisors is an integer number (5958161).

Almost surely, 2^39885129 is an apocalyptic number.

It is an amenable number.

39885129 is a deficient number, since it is larger than the sum of its proper divisors (19696481).

39885129 is an equidigital number, since it uses as much as digits as its factorization.

39885129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492421 (or 492412 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 39885129 is about 6315.4674411321. The cubic root of 39885129 is about 341.6674977044.

The spelling of 39885129 in words is "thirty-nine million, eight hundred eighty-five thousand, one hundred twenty-nine".