78988776 has 64 divisors (see below), whose sum is σ = 210470400. Its totient is φ = 24631488.

The previous prime is 78988769. The next prime is 78988781. The reversal of 78988776 is 67788987.

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 15 ways as a sum of consecutive naturals, for example, 36805 + ... + 38891.

It is an arithmetic number, because the mean of its divisors is an integer number (3288600).

Almost surely, 2^78988776 is an apocalyptic number.

78988776 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78988776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105235200).

78988776 is an abundant number, since it is smaller than the sum of its proper divisors (131481624).

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

78988776 is a wasteful number, since it uses less digits than its factorization.

78988776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198 (or 2194 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 60.

The square root of 78988776 is about 8887.5629955573. The cubic root of 78988776 is about 429.0637208993.

The spelling of 78988776 in words is "seventy-eight million, nine hundred eighty-eight thousand, seven hundred seventy-six".