39940164 has 108 divisors (see below), whose sum is σ = 113719788. Its totient is φ = 11806080.

The previous prime is 39940151. The next prime is 39940171. The reversal of 39940164 is 46104993.

It can be written as a sum of positive squares in 2 ways, for example, as 32970564 + 6969600 = 5742^2 + 2640^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 230782 + ... + 230954.

It is an arithmetic number, because the mean of its divisors is an integer number (1052961).

Almost surely, 2^39940164 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 39940164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56859894).

39940164 is an abundant number, since it is smaller than the sum of its proper divisors (73779624).

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

39940164 is a wasteful number, since it uses less digits than its factorization.

39940164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 39940164 is about 6319.8230987900. The cubic root of 39940164 is about 341.8245740313.

It can be divided in two parts, 39940 and 164, that added together give a palindrome (40104).

The spelling of 39940164 in words is "thirty-nine million, nine hundred forty thousand, one hundred sixty-four".