78813756 has 144 divisors (see below), whose sum is σ = 243038880. Its totient is φ = 22014720.

The previous prime is 78813733. The next prime is 78813803. The reversal of 78813756 is 65731887.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 280336 + ... + 280616.

It is an arithmetic number, because the mean of its divisors is an integer number (1687770).

Almost surely, 2^78813756 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 78813756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121519440).

78813756 is an abundant number, since it is smaller than the sum of its proper divisors (164225124).

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

78813756 is a wasteful number, since it uses less digits than its factorization.

78813756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 346 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 78813756 is about 8877.7111915178. The cubic root of 78813756 is about 428.7465861175.

The spelling of 78813756 in words is "seventy-eight million, eight hundred thirteen thousand, seven hundred fifty-six".