78459922 has 4 divisors (see below), whose sum is σ = 117689886. Its totient is φ = 39229960.

The previous prime is 78459893. The next prime is 78459989. The reversal of 78459922 is 22995487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22995487 = 1481 ⋅15527.

It can be written as a sum of positive squares in only one way, i.e., 64464841 + 13995081 = 8029^2 + 3741^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19614979 + ... + 19614982.

Almost surely, 2^78459922 is an apocalyptic number.

78459922 is a deficient number, since it is larger than the sum of its proper divisors (39229964).

78459922 is a wasteful number, since it uses less digits than its factorization.

78459922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39229963.

The product of its digits is 362880, while the sum is 46.

The square root of 78459922 is about 8857.7605521938. The cubic root of 78459922 is about 428.1040049164.

It can be divided in two parts, 784 and 59922, that added together give a palindrome (60706).

The spelling of 78459922 in words is "seventy-eight million, four hundred fifty-nine thousand, nine hundred twenty-two".