82178312 has 16 divisors (see below), whose sum is σ = 154275840. Its totient is φ = 41038096.

The previous prime is 82178297. The next prime is 82178359. The reversal of 82178312 is 21387128.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953 + ... + 12855.

It is an arithmetic number, because the mean of its divisors is an integer number (9642240).

Almost surely, 2^82178312 is an apocalyptic number.

It is an amenable number.

82178312 is a deficient number, since it is larger than the sum of its proper divisors (72097528).

82178312 is a wasteful number, since it uses less digits than its factorization.

82178312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12772 (or 12768 counting only the distinct ones).

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

The square root of 82178312 is about 9065.2254246654. The cubic root of 82178312 is about 434.7628283905.

The spelling of 82178312 in words is "eighty-two million, one hundred seventy-eight thousand, three hundred twelve".