78182312 has 16 divisors (see below), whose sum is σ = 157868340. Its totient is φ = 36084096.

The previous prime is 78182311. The next prime is 78182323. The reversal of 78182312 is 21328187.

It can be written as a sum of positive squares in 2 ways, for example, as 75446596 + 2735716 = 8686^2 + 1654^2 .

It is a super-2 number, since 2×78182312² = 12224947819330688, which contains 22 as substring.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (78182311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375773 + ... + 375980.

Almost surely, 2^78182312 is an apocalyptic number.

It is an amenable number.

78182312 is an abundant number, since it is smaller than the sum of its proper divisors (79686028).

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

78182312 is a wasteful number, since it uses less digits than its factorization.

78182312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751772 (or 751768 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 78182312 is about 8842.0762267694. The cubic root of 78182312 is about 427.5984967349.

The spelling of 78182312 in words is "seventy-eight million, one hundred eighty-two thousand, three hundred twelve".