78988877828 has 24 divisors (see below), whose sum is σ = 164846355072. Its totient is φ = 32380533504.

The previous prime is 78988877791. The next prime is 78988877831. The reversal of 78988877828 is 82877888987.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 61326125 + ... + 61327412.

It is an arithmetic number, because the mean of its divisors is an integer number (6868598128).

Almost surely, 2^78988877828 is an apocalyptic number.

It is an amenable number.

78988877828 is an abundant number, since it is smaller than the sum of its proper divisors (85857477244).

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

78988877828 is a wasteful number, since it uses less digits than its factorization.

78988877828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122653571 (or 122653569 counting only the distinct ones).

The product of its digits is 1618477056, while the sum is 80.

The spelling of 78988877828 in words is "seventy-eight billion, nine hundred eighty-eight million, eight hundred seventy-seven thousand, eight hundred twenty-eight".