78687468 has 36 divisors (see below), whose sum is σ = 200845008. Its totient is φ = 25973280.

The previous prime is 78687461. The next prime is 78687473. The reversal of 78687468 is 86478687.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (78687461) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6903 + ... + 14318.

It is an arithmetic number, because the mean of its divisors is an integer number (5579028).

Almost surely, 2^78687468 is an apocalyptic number.

It is an amenable number.

78687468 is an abundant number, since it is smaller than the sum of its proper divisors (122157540).

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

78687468 is a wasteful number, since it uses less digits than its factorization.

78687468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21334 (or 21329 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 78687468 is about 8870.5956958933. The cubic root of 78687468 is about 428.5174615856.

The spelling of 78687468 in words is "seventy-eight million, six hundred eighty-seven thousand, four hundred sixty-eight".