78939320 has 64 divisors (see below), whose sum is σ = 183168000. Its totient is φ = 30602880.

The previous prime is 78939293. The next prime is 78939323. The reversal of 78939320 is 2393987.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78939323) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 374015 + ... + 374225.

It is an arithmetic number, because the mean of its divisors is an integer number (2862000).

Almost surely, 2^78939320 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 78939320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91584000).

78939320 is an abundant number, since it is smaller than the sum of its proper divisors (104228680).

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

78939320 is a wasteful number, since it uses less digits than its factorization.

78939320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 78939320 is about 8884.7802448907. The cubic root of 78939320 is about 428.9741545640.

The spelling of 78939320 in words is "seventy-eight million, nine hundred thirty-nine thousand, three hundred twenty".