39634864 has 40 divisors (see below), whose sum is σ = 81244800. Its totient is φ = 18700800.

The previous prime is 39634849. The next prime is 39634867. The reversal of 39634864 is 46843693.

39634864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 39634864.

It is not an unprimeable number, because it can be changed into a prime (39634867) 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 7 ways as a sum of consecutive naturals, for example, 19362 + ... + 21310.

It is an arithmetic number, because the mean of its divisors is an integer number (2031120).

Almost surely, 2^39634864 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 39634864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40622400).

39634864 is an abundant number, since it is smaller than the sum of its proper divisors (41609936).

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

39634864 is a wasteful number, since it uses less digits than its factorization.

39634864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029 (or 2023 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The square root of 39634864 is about 6295.6226062241. The cubic root of 39634864 is about 340.9513838094.

The spelling of 39634864 in words is "thirty-nine million, six hundred thirty-four thousand, eight hundred sixty-four".