78286722 has 8 divisors (see below), whose sum is σ = 156573456. Its totient is φ = 26095572.

The previous prime is 78286721. The next prime is 78286727. The reversal of 78286722 is 22768287.

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

78286722 is an admirable number.

It is a super-2 number, since 2×78286722² = 12257621683010568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78286721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6523888 + ... + 6523899.

It is an arithmetic number, because the mean of its divisors is an integer number (19571682).

Almost surely, 2^78286722 is an apocalyptic number.

78286722 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.

78286722 is a wasteful number, since it uses less digits than its factorization.

78286722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13047792.

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

The square root of 78286722 is about 8847.9784131744. The cubic root of 78286722 is about 427.7887601436.

The spelling of 78286722 in words is "seventy-eight million, two hundred eighty-six thousand, seven hundred twenty-two".