78859922 has 4 divisors (see below), whose sum is σ = 118289886. Its totient is φ = 39429960.

The previous prime is 78859909. The next prime is 78859927. The reversal of 78859922 is 22995887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22995887 = 97 ⋅237071.

It can be written as a sum of positive squares in only one way, i.e., 43943641 + 34916281 = 6629^2 + 5909^2 .

It is not an unprimeable number, because it can be changed into a prime (78859927) 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 as a sum of consecutive naturals, namely, 19714979 + ... + 19714982.

Almost surely, 2^78859922 is an apocalyptic number.

78859922 is a deficient number, since it is larger than the sum of its proper divisors (39429964).

78859922 is a wasteful number, since it uses less digits than its factorization.

78859922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39429963.

The product of its digits is 725760, while the sum is 50.

The square root of 78859922 is about 8880.3109179803. The cubic root of 78859922 is about 428.8302840758.

The spelling of 78859922 in words is "seventy-eight million, eight hundred fifty-nine thousand, nine hundred twenty-two".