78805412 has 96 divisors (see below), whose sum is σ = 174155520. Its totient is φ = 30481920.

The previous prime is 78805411. The next prime is 78805427. The reversal of 78805412 is 21450887.

It is not an unprimeable number, because it can be changed into a prime (78805411) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1291862 + ... + 1291922.

It is an arithmetic number, because the mean of its divisors is an integer number (1814120).

Almost surely, 2^78805412 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 78805412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87077760).

78805412 is an abundant number, since it is smaller than the sum of its proper divisors (95350108).

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

78805412 is a wasteful number, since it uses less digits than its factorization.

78805412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 78805412 is about 8877.2412381325. The cubic root of 78805412 is about 428.7314551389.

The spelling of 78805412 in words is "seventy-eight million, eight hundred five thousand, four hundred twelve".