78634776 has 64 divisors (see below), whose sum is σ = 221875200. Its totient is φ = 23004800.

The previous prime is 78634763. The next prime is 78634811. The reversal of 78634776 is 67743687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2521 + ... + 12791.

It is an arithmetic number, because the mean of its divisors is an integer number (3466800).

Almost surely, 2^78634776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78634776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110937600).

78634776 is an abundant number, since it is smaller than the sum of its proper divisors (143240424).

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

78634776 is a wasteful number, since it uses less digits than its factorization.

78634776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10320 (or 10316 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 48.

The square root of 78634776 is about 8867.6251612255. The cubic root of 78634776 is about 428.4217899174.

The spelling of 78634776 in words is "seventy-eight million, six hundred thirty-four thousand, seven hundred seventy-six".