39878492416 has 81 divisors (see below), whose sum is σ = 92649287871. Its totient is φ = 17081197056.

The previous prime is 39878492389. The next prime is 39878492429. The reversal of 39878492416 is 61429487893.

The square root of 39878492416 is 199696.

It is a perfect power (a square), and thus also a powerful number.

Its product of digits (20901888) is a multiple of the sum of its prime divisors (1792).

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 8 ways as a sum of consecutive naturals, for example, 22365061 + ... + 22366843.

Almost surely, 2^39878492416 is an apocalyptic number.

39878492416 is the 199696-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39878492416

39878492416 is an abundant number, since it is smaller than the sum of its proper divisors (52770795455).

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

39878492416 is an frugal number, since it uses more digits than its factorization.

39878492416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3596 (or 1792 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 61.

The spelling of 39878492416 in words is "thirty-nine billion, eight hundred seventy-eight million, four hundred ninety-two thousand, four hundred sixteen".