39685020 has 24 divisors (see below), whose sum is σ = 111118224. Its totient is φ = 10582656.

The previous prime is 39685003. The next prime is 39685027. The reversal of 39685020 is 2058693.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39685027) 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, 330649 + ... + 330768.

It is an arithmetic number, because the mean of its divisors is an integer number (4629926).

Almost surely, 2^39685020 is an apocalyptic number.

39685020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39685020 is an abundant number, since it is smaller than the sum of its proper divisors (71433204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39685020 is a wasteful number, since it uses less digits than its factorization.

39685020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661429 (or 661427 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 39685020 is about 6299.6047495061. The cubic root of 39685020 is about 341.0951423388.

The spelling of 39685020 in words is "thirty-nine million, six hundred eighty-five thousand, twenty".