78920084 has 12 divisors (see below), whose sum is σ = 144115104. Its totient is φ = 37744344.

The previous prime is 78920077. The next prime is 78920089. The reversal of 78920084 is 48002987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78920089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428822 + ... + 429005.

It is an arithmetic number, because the mean of its divisors is an integer number (12009592).

Almost surely, 2^78920084 is an apocalyptic number.

It is an amenable number.

78920084 is a deficient number, since it is larger than the sum of its proper divisors (65195020).

78920084 is a wasteful number, since it uses less digits than its factorization.

78920084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857854 (or 857852 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 78920084 is about 8883.6976535675. The cubic root of 78920084 is about 428.9393074722.

The spelling of 78920084 in words is "seventy-eight million, nine hundred twenty thousand, eighty-four".