39885012 has 18 divisors (see below), whose sum is σ = 100820538. Its totient is φ = 13294992.

The previous prime is 39884993. The next prime is 39885017. The reversal of 39885012 is 21058893.

It can be written as a sum of positive squares in only one way, i.e., 22695696 + 17189316 = 4764^2 + 4146^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1107917 = 39885012 / (3 + 9 + 8 + 8 + 5 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39885017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553923 + ... + 553994.

It is an arithmetic number, because the mean of its divisors is an integer number (5601141).

Almost surely, 2^39885012 is an apocalyptic number.

It is an amenable number.

39885012 is an abundant number, since it is smaller than the sum of its proper divisors (60935526).

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

39885012 is a wasteful number, since it uses less digits than its factorization.

39885012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107927 (or 1107922 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 39885012 is about 6315.4581781530. The cubic root of 39885012 is about 341.6671636188.

The spelling of 39885012 in words is "thirty-nine million, eight hundred eighty-five thousand, twelve".