8378942872 has 32 divisors (see below), whose sum is σ = 16601126400. Its totient is φ = 3956588064.

The previous prime is 8378942861. The next prime is 8378942899. The reversal of 8378942872 is 2782498738.

It is a happy number.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273678 + ... + 302749.

It is an arithmetic number, because the mean of its divisors is an integer number (518785200).

Almost surely, 2^8378942872 is an apocalyptic number.

It is an amenable number.

8378942872 is a deficient number, since it is larger than the sum of its proper divisors (8222183528).

8378942872 is a wasteful number, since it uses less digits than its factorization.

8378942872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576535 (or 576531 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The square root of 8378942872 is about 91536.5657647260. The cubic root of 8378942872 is about 2031.0926900603.

The spelling of 8378942872 in words is "eight billion, three hundred seventy-eight million, nine hundred forty-two thousand, eight hundred seventy-two".