78663486 has 64 divisors (see below), whose sum is σ = 180299520. Its totient is φ = 22659840.

The previous prime is 78663467. The next prime is 78663491. The reversal of 78663486 is 68436687.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139441 + ... + 140003.

It is an arithmetic number, because the mean of its divisors is an integer number (2817180).

Almost surely, 2^78663486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78663486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90149760).

78663486 is an abundant number, since it is smaller than the sum of its proper divisors (101636034).

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

78663486 is a wasteful number, since it uses less digits than its factorization.

78663486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681.

The product of its digits is 1161216, while the sum is 48.

The square root of 78663486 is about 8869.2438234609. The cubic root of 78663486 is about 428.4739233101.

The spelling of 78663486 in words is "seventy-eight million, six hundred sixty-three thousand, four hundred eighty-six".