78889722 has 8 divisors (see below), whose sum is σ = 157779456. Its totient is φ = 26296572.

The previous prime is 78889703. The next prime is 78889763. The reversal of 78889722 is 22798887.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

78889722 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6574138 + ... + 6574149.

It is an arithmetic number, because the mean of its divisors is an integer number (19722432).

Almost surely, 2^78889722 is an apocalyptic number.

78889722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78889722 is a wasteful number, since it uses less digits than its factorization.

78889722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13148292.

The product of its digits is 903168, while the sum is 51.

The square root of 78889722 is about 8881.9886286800. The cubic root of 78889722 is about 428.8842934839.

The spelling of 78889722 in words is "seventy-eight million, eight hundred eighty-nine thousand, seven hundred twenty-two".