39620985 has 16 divisors (see below), whose sum is σ = 66730560. Its totient is φ = 20018880.

The previous prime is 39620981. The next prime is 39620993. The reversal of 39620985 is 58902693.

39620985 = 1986² + 1987² + ... + 1995².

39620985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39620985 - 2² = 39620981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39620981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69226 + ... + 69795.

It is an arithmetic number, because the mean of its divisors is an integer number (4170660).

Almost surely, 2^39620985 is an apocalyptic number.

It is an amenable number.

39620985 is a deficient number, since it is larger than the sum of its proper divisors (27109575).

39620985 is a wasteful number, since it uses less digits than its factorization.

39620985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139048.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 39620985 is about 6294.5202358877. The cubic root of 39620985 is about 340.9115820101.

The spelling of 39620985 in words is "thirty-nine million, six hundred twenty thousand, nine hundred eighty-five".