39965860 has 48 divisors (see below), whose sum is σ = 91990080. Its totient is φ = 14464640.

The previous prime is 39965803. The next prime is 39965897. The reversal of 39965860 is 6856993.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 39965860.

It is an unprimeable number.

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, 85347 + ... + 85813.

It is an arithmetic number, because the mean of its divisors is an integer number (1916460).

Almost surely, 2^39965860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39965860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45995040).

39965860 is an abundant number, since it is smaller than the sum of its proper divisors (52024220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39965860 is a wasteful number, since it uses less digits than its factorization.

39965860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 39965860 is about 6321.8557402079. The cubic root of 39965860 is about 341.8978640097.

The spelling of 39965860 in words is "thirty-nine million, nine hundred sixty-five thousand, eight hundred sixty".