39932985 has 16 divisors (see below), whose sum is σ = 63971136. Its totient is φ = 21271488.

The previous prime is 39932969. The next prime is 39932987. The reversal of 39932985 is 58923993.

It is not a de Polignac number, because 39932985 - 2⁴ = 39932969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39932987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23122 + ... + 24788.

It is an arithmetic number, because the mean of its divisors is an integer number (3998196).

Almost surely, 2^39932985 is an apocalyptic number.

It is an amenable number.

39932985 is a deficient number, since it is larger than the sum of its proper divisors (24038151).

39932985 is a wasteful number, since it uses less digits than its factorization.

39932985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272.

The product of its digits is 524880, while the sum is 48.

The square root of 39932985 is about 6319.2550985065. The cubic root of 39932985 is about 341.8040925125.

It can be divided in two parts, 399 and 32985, that multiplied together give a triangular number (13161015 = T₅₁₃₀).

The spelling of 39932985 in words is "thirty-nine million, nine hundred thirty-two thousand, nine hundred eighty-five".