78688413 has 12 divisors (see below), whose sum is σ = 114360480. Its totient is φ = 52136136.

The previous prime is 78688403. The next prime is 78688417. The reversal of 78688413 is 31488687.

It is not a de Polignac number, because 78688413 - 2⁸ = 78688157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78688417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25353 + ... + 28286.

It is an arithmetic number, because the mean of its divisors is an integer number (9530040).

Almost surely, 2^78688413 is an apocalyptic number.

It is an amenable number.

78688413 is a deficient number, since it is larger than the sum of its proper divisors (35672067).

78688413 is a wasteful number, since it uses less digits than its factorization.

78688413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53808 (or 53805 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 78688413 is about 8870.6489616037. The cubic root of 78688413 is about 428.5191770107.

The spelling of 78688413 in words is "seventy-eight million, six hundred eighty-eight thousand, four hundred thirteen".