78130012 has 6 divisors (see below), whose sum is σ = 136727528. Its totient is φ = 39065004.

The previous prime is 78129971. The next prime is 78130021. The reversal of 78130012 is 21003187.

It is a super-2 number, since 2×78130012² = 12208597550240288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9766248 + ... + 9766255.

Almost surely, 2^78130012 is an apocalyptic number.

It is an amenable number.

78130012 is a deficient number, since it is larger than the sum of its proper divisors (58597516).

78130012 is a wasteful number, since it uses less digits than its factorization.

78130012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19532507 (or 19532505 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 78130012 is about 8839.1182818197. The cubic root of 78130012 is about 427.5031282331.

Adding to 78130012 its reverse (21003187), we get a palindrome (99133199).

The spelling of 78130012 in words is "seventy-eight million, one hundred thirty thousand, twelve".