78107812 has 12 divisors (see below), whose sum is σ = 136774960. Its totient is φ = 39029256.

The previous prime is 78107801. The next prime is 78107857. The reversal of 78107812 is 21870187.

It is a super-2 number, since 2×78107812² = 12201660590854688, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2239 + ... + 12697.

Almost surely, 2^78107812 is an apocalyptic number.

It is an amenable number.

78107812 is a deficient number, since it is larger than the sum of its proper divisors (58667148).

78107812 is a wasteful number, since it uses less digits than its factorization.

78107812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12330 (or 12328 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 78107812 is about 8837.8624112395. The cubic root of 78107812 is about 427.4626338988.

Adding to 78107812 its reverse (21870187), we get a palindrome (99977999).

The spelling of 78107812 in words is "seventy-eight million, one hundred seven thousand, eight hundred twelve".