78763784 has 32 divisors (see below), whose sum is σ = 162216000. Its totient is φ = 35555520.

The previous prime is 78763781. The next prime is 78763801. The reversal of 78763784 is 48736787.

It is not an unprimeable number, because it can be changed into a prime (78763781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10109 + ... + 16115.

It is an arithmetic number, because the mean of its divisors is an integer number (5069250).

Almost surely, 2^78763784 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 78763784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81108000).

78763784 is an abundant number, since it is smaller than the sum of its proper divisors (83452216).

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

78763784 is a wasteful number, since it uses less digits than its factorization.

78763784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173 (or 6169 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 50.

The square root of 78763784 is about 8874.8962810841. The cubic root of 78763784 is about 428.6559511178.

The spelling of 78763784 in words is "seventy-eight million, seven hundred sixty-three thousand, seven hundred eighty-four".