39985670 has 8 divisors (see below), whose sum is σ = 71974224. Its totient is φ = 15994264.

The previous prime is 39985643. The next prime is 39985697. The reversal of 39985670 is 7658993.

It is an interprime number because it is at equal distance from previous prime (39985643) and next prime (39985697).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1999274 + ... + 1999293.

It is an arithmetic number, because the mean of its divisors is an integer number (8996778).

Almost surely, 2^39985670 is an apocalyptic number.

39985670 is a deficient number, since it is larger than the sum of its proper divisors (31988554).

39985670 is a wasteful number, since it uses less digits than its factorization.

39985670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998574.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 39985670 is about 6323.4223328827. The cubic root of 39985670 is about 341.9543445319.

The spelling of 39985670 in words is "thirty-nine million, nine hundred eighty-five thousand, six hundred seventy".