39973870 has 16 divisors (see below), whose sum is σ = 72217728. Its totient is φ = 15930720.

The previous prime is 39973867. The next prime is 39973873. The reversal of 39973870 is 7837993.

It is an interprime number because it is at equal distance from previous prime (39973867) and next prime (39973873).

It is a self number, because there is not a number n which added to its sum of digits gives 39973870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39973873) 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, 4446 + ... + 9985.

It is an arithmetic number, because the mean of its divisors is an integer number (4513608).

Almost surely, 2^39973870 is an apocalyptic number.

39973870 is a deficient number, since it is larger than the sum of its proper divisors (32243858).

39973870 is a wasteful number, since it uses less digits than its factorization.

39973870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14715.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 39973870 is about 6322.4892249809. The cubic root of 39973870 is about 341.9207036613.

The spelling of 39973870 in words is "thirty-nine million, nine hundred seventy-three thousand, eight hundred seventy".