39989625 has 48 divisors (see below), whose sum is σ = 72169344. Its totient is φ = 19656000.

The previous prime is 39989581. The next prime is 39989629. The reversal of 39989625 is 52698993.

It is not a de Polignac number, because 39989625 - 2⁷ = 39989497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39989629) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63060 + ... + 63690.

It is an arithmetic number, because the mean of its divisors is an integer number (1503528).

Almost surely, 2^39989625 is an apocalyptic number.

It is an amenable number.

39989625 is a deficient number, since it is larger than the sum of its proper divisors (32179719).

39989625 is a wasteful number, since it uses less digits than its factorization.

39989625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 652 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 51.

The square root of 39989625 is about 6323.7350513759. The cubic root of 39989625 is about 341.9656184445.

The spelling of 39989625 in words is "thirty-nine million, nine hundred eighty-nine thousand, six hundred twenty-five".