78644922 has 16 divisors (see below), whose sum is σ = 157686912. Its totient is φ = 26148800.

The previous prime is 78644887. The next prime is 78644927. The reversal of 78644922 is 22944687.

It is not an unprimeable number, because it can be changed into a prime (78644927) 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, 13938 + ... + 18749.

It is an arithmetic number, because the mean of its divisors is an integer number (9855432).

Almost surely, 2^78644922 is an apocalyptic number.

78644922 is an abundant number, since it is smaller than the sum of its proper divisors (79041990).

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

78644922 is a wasteful number, since it uses less digits than its factorization.

78644922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33093.

The product of its digits is 193536, while the sum is 42.

The square root of 78644922 is about 8868.1972237879. The cubic root of 78644922 is about 428.4402151010.

The spelling of 78644922 in words is "seventy-eight million, six hundred forty-four thousand, nine hundred twenty-two".