39879680 has 44 divisors (see below), whose sum is σ = 95676780. Its totient is φ = 15949824.

The previous prime is 39879661. The next prime is 39879703. The reversal of 39879680 is 8697893.

It can be written as a sum of positive squares in 2 ways, for example, as 18939904 + 20939776 = 4352^2 + 4576^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226 + ... + 9014.

Almost surely, 2^39879680 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 39879680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47838390).

39879680 is an abundant number, since it is smaller than the sum of its proper divisors (55797100).

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

39879680 is an equidigital number, since it uses as much as digits as its factorization.

39879680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7814 (or 7796 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 39879680 is about 6315.0360252337. The cubic root of 39879680 is about 341.6519377615.

The spelling of 39879680 in words is "thirty-nine million, eight hundred seventy-nine thousand, six hundred eighty".