78722286 has 16 divisors (see below), whose sum is σ = 157555200. Its totient is φ = 26222328.

The previous prime is 78722279. The next prime is 78722309. The reversal of 78722286 is 68222787.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6825 + ... + 14283.

It is an arithmetic number, because the mean of its divisors is an integer number (9847200).

Almost surely, 2^78722286 is an apocalyptic number.

78722286 is an abundant number, since it is smaller than the sum of its proper divisors (78832914).

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

78722286 is a wasteful number, since it uses less digits than its factorization.

78722286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9223.

The product of its digits is 150528, while the sum is 42.

The square root of 78722286 is about 8872.5580302413. The cubic root of 78722286 is about 428.5806564045.

The spelling of 78722286 in words is "seventy-eight million, seven hundred twenty-two thousand, two hundred eighty-six".