78319922 has 32 divisors (see below), whose sum is σ = 126935424. Its totient is φ = 36150400.

The previous prime is 78319903. The next prime is 78319933. The reversal of 78319922 is 22991387.

It is a happy number.

It is a super-2 number, since 2×78319922² = 12268020364172168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 78319922.

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 in 15 ways as a sum of consecutive naturals, for example, 246908 + ... + 247224.

It is an arithmetic number, because the mean of its divisors is an integer number (3966732).

Almost surely, 2^78319922 is an apocalyptic number.

78319922 is a deficient number, since it is larger than the sum of its proper divisors (48615502).

78319922 is a wasteful number, since it uses less digits than its factorization.

78319922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514.

The product of its digits is 54432, while the sum is 41.

The square root of 78319922 is about 8849.8543490839. The cubic root of 78319922 is about 427.8492241203.

The spelling of 78319922 in words is "seventy-eight million, three hundred nineteen thousand, nine hundred twenty-two".