78888888890 has 64 divisors (see below), whose sum is σ = 164889665280. Its totient is φ = 26616522240.

The previous prime is 78888888863. The next prime is 78888888907. The reversal of 78888888890 is 9888888887.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1284524 + ... + 1344536.

It is an arithmetic number, because the mean of its divisors is an integer number (2576401020).

Almost surely, 2^78888888890 is an apocalyptic number.

78888888890 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78888888890 is an abundant number, since it is smaller than the sum of its proper divisors (86000776390).

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

78888888890 is a wasteful number, since it uses less digits than its factorization.

78888888890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60327.

The product of its (nonzero) digits is 1056964608, while the sum is 80.

It can be divided in two parts, 788888 and 88890, that added together give a palindrome (877778).

The spelling of 78888888890 in words is "seventy-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred ninety".