39513985 has 16 divisors (see below), whose sum is σ = 54957312. Its totient is φ = 26712000.

The previous prime is 39513961. The next prime is 39513997. The reversal of 39513985 is 58931593.

It is not a de Polignac number, because 39513985 - 2⁷ = 39513857 is a prime.

It is a super-2 number, since 2×39513985² = 3122710021160450, which contains 22 as substring.

It is a Duffinian number.

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, 5466 + ... + 10435.

It is an arithmetic number, because the mean of its divisors is an integer number (3434832).

Almost surely, 2^39513985 is an apocalyptic number.

39513985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39513985 is a deficient number, since it is larger than the sum of its proper divisors (15443327).

39513985 is a wasteful number, since it uses less digits than its factorization.

39513985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15984.

The product of its digits is 145800, while the sum is 43.

The square root of 39513985 is about 6286.0150333896. The cubic root of 39513985 is about 340.6044179691.

The spelling of 39513985 in words is "thirty-nine million, five hundred thirteen thousand, nine hundred eighty-five".