78318120 has 32 divisors (see below), whose sum is σ = 234954720. Its totient is φ = 20884800.

The previous prime is 78318089. The next prime is 78318137. The reversal of 78318120 is 2181387.

It is a happy number.

It is a super-2 number, since 2×78318120² = 12267455840668800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326206 + ... + 326445.

It is an arithmetic number, because the mean of its divisors is an integer number (7342335).

Almost surely, 2^78318120 is an apocalyptic number.

It is an amenable number.

78318120 is an abundant number, since it is smaller than the sum of its proper divisors (156636600).

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

78318120 is a wasteful number, since it uses less digits than its factorization.

78318120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652665 (or 652661 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 78318120 is about 8849.7525389132. The cubic root of 78318120 is about 427.8459427491.

It can be divided in two parts, 7831 and 8120, that added together give a palindrome (15951).

The spelling of 78318120 in words is "seventy-eight million, three hundred eighteen thousand, one hundred twenty".