78827736 has 64 divisors (see below), whose sum is σ = 215197920. Its totient is φ = 23915520.

The previous prime is 78827731. The next prime is 78827737. The reversal of 78827736 is 63772887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78827731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21046 + ... + 24506.

Almost surely, 2^78827736 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 78827736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107598960).

78827736 is an abundant number, since it is smaller than the sum of its proper divisors (136370184).

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

78827736 is a wasteful number, since it uses less digits than its factorization.

78827736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556 (or 3552 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

The square root of 78827736 is about 8878.4985217096. The cubic root of 78827736 is about 428.7719350042.

The spelling of 78827736 in words is "seventy-eight million, eight hundred twenty-seven thousand, seven hundred thirty-six".