78518988 has 54 divisors (see below), whose sum is σ = 210868476. Its totient is φ = 24630144.

The previous prime is 78518983. The next prime is 78519031. The reversal of 78518988 is 88981587.

It is not an unprimeable number, because it can be changed into a prime (78518983) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 6631 + ... + 14177.

Almost surely, 2^78518988 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 78518988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105434238).

78518988 is an abundant number, since it is smaller than the sum of its proper divisors (132349488).

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

78518988 is a wasteful number, since it uses less digits than its factorization.

78518988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7591 (or 7569 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The square root of 78518988 is about 8861.0940633761. The cubic root of 78518988 is about 428.2114060278.

The spelling of 78518988 in words is "seventy-eight million, five hundred eighteen thousand, nine hundred eighty-eight".