78118912 has 40 divisors (see below), whose sum is σ = 157286250. Its totient is φ = 38797312.

The previous prime is 78118903. The next prime is 78118919. The reversal of 78118912 is 21981187.

It can be written as a sum of positive squares in only one way, i.e., 75759616 + 2359296 = 8704^2 + 1536^2 .

It is a super-2 number, since 2×78118912² = 12205128824127488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78118919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 524214 + ... + 524362.

Almost surely, 2^78118912 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 78118912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78643125).

78118912 is an abundant number, since it is smaller than the sum of its proper divisors (79167338).

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

78118912 is an frugal number, since it uses more digits than its factorization.

78118912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 151 counting only the distinct ones).

The product of its digits is 8064, while the sum is 37.

The square root of 78118912 is about 8838.4903688356. The cubic root of 78118912 is about 427.4828820249.

The spelling of 78118912 in words is "seventy-eight million, one hundred eighteen thousand, nine hundred twelve".