78865344 has 84 divisors (see below), whose sum is σ = 235921296. Its totient is φ = 25141248.

The previous prime is 78865343. The next prime is 78865351. The reversal of 78865344 is 44356887.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78865344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78865343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10272 + ... + 16224.

Almost surely, 2^78865344 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 78865344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117960648).

78865344 is an abundant number, since it is smaller than the sum of its proper divisors (157055952).

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

78865344 is a wasteful number, since it uses less digits than its factorization.

78865344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994 (or 5981 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 78865344 is about 8880.6161948369. The cubic root of 78865344 is about 428.8401119007.

The spelling of 78865344 in words is "seventy-eight million, eight hundred sixty-five thousand, three hundred forty-four".