78830928 has 160 divisors (see below), whose sum is σ = 252305280. Its totient is φ = 23362560.

The previous prime is 78830881. The next prime is 78830951. The reversal of 78830928 is 82903887.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251700 + ... + 252012.

It is an arithmetic number, because the mean of its divisors is an integer number (1576908).

Almost surely, 2^78830928 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 78830928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126152640).

78830928 is an abundant number, since it is smaller than the sum of its proper divisors (173474352).

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

78830928 is a wasteful number, since it uses less digits than its factorization.

78830928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 78830928 is about 8878.6782800144. The cubic root of 78830928 is about 428.7777223984. Note that the first 4 decimals are identical.

The spelling of 78830928 in words is "seventy-eight million, eight hundred thirty thousand, nine hundred twenty-eight".