78918488 has 64 divisors (see below), whose sum is σ = 173560320. Its totient is φ = 33241600.

The previous prime is 78918479. The next prime is 78918491. The reversal of 78918488 is 88481987.

It is a super-2 number, since 2×78918488² = 12456255496412288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105845 + ... + 106587.

It is an arithmetic number, because the mean of its divisors is an integer number (2711880).

Almost surely, 2^78918488 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 78918488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86780160).

78918488 is an abundant number, since it is smaller than the sum of its proper divisors (94641832).

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

78918488 is a wasteful number, since it uses less digits than its factorization.

78918488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 844 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 53.

The square root of 78918488 is about 8883.6078256528. The cubic root of 78918488 is about 428.9364159744.

The spelling of 78918488 in words is "seventy-eight million, nine hundred eighteen thousand, four hundred eighty-eight".