78834784 has 48 divisors (see below), whose sum is σ = 178059168. Its totient is φ = 33656832.

The previous prime is 78834761. The next prime is 78834793. The reversal of 78834784 is 48743887.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78574 + ... + 79570.

It is an arithmetic number, because the mean of its divisors is an integer number (3709566).

Almost surely, 2^78834784 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 78834784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89029584).

78834784 is an abundant number, since it is smaller than the sum of its proper divisors (99224384).

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

78834784 is a wasteful number, since it uses less digits than its factorization.

78834784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 1359 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 49.

The square root of 78834784 is about 8878.8954267972. The cubic root of 78834784 is about 428.7847134782.

The spelling of 78834784 in words is "seventy-eight million, eight hundred thirty-four thousand, seven hundred eighty-four".