78834432 has 72 divisors (see below), whose sum is σ = 218985984. Its totient is φ = 25129984.

The previous prime is 78834421. The next prime is 78834433. The reversal of 78834432 is 23443887.

It is not an unprimeable number, because it can be changed into a prime (78834433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15433 + ... + 19895.

It is an arithmetic number, because the mean of its divisors is an integer number (3041472).

Almost surely, 2^78834432 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 78834432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109492992).

78834432 is an abundant number, since it is smaller than the sum of its proper divisors (140151552).

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

78834432 is a wasteful number, since it uses less digits than its factorization.

78834432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505 (or 4491 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 78834432 is about 8878.8756044896. The cubic root of 78834432 is about 428.7840752978.

The spelling of 78834432 in words is "seventy-eight million, eight hundred thirty-four thousand, four hundred thirty-two".