39870136 has 8 divisors (see below), whose sum is σ = 74756520. Its totient is φ = 19935064.

The previous prime is 39870107. The next prime is 39870139. The reversal of 39870136 is 63107893.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 39870095 and 39870104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39870139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2491876 + ... + 2491891.

It is an arithmetic number, because the mean of its divisors is an integer number (9344565).

Almost surely, 2^39870136 is an apocalyptic number.

It is an amenable number.

39870136 is a deficient number, since it is larger than the sum of its proper divisors (34886384).

39870136 is a wasteful number, since it uses less digits than its factorization.

39870136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983773 (or 4983769 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 39870136 is about 6314.2803232039. The cubic root of 39870136 is about 341.6246808874.

The spelling of 39870136 in words is "thirty-nine million, eight hundred seventy thousand, one hundred thirty-six".