78722 has 8 divisors (see below), whose sum is σ = 134976. Its totient is φ = 33732.

The previous prime is 78721. The next prime is 78737. The reversal of 78722 is 22787.

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

It is a junction number, because it is equal to n+sod(n) for n = 78691 and 78700.

It is not an unprimeable number, because it can be changed into a prime (78721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2798 + ... + 2825.

It is an arithmetic number, because the mean of its divisors is an integer number (16872).

2⁷⁸⁷²² is an apocalyptic number.

78722 is a deficient number, since it is larger than the sum of its proper divisors (56254).

78722 is a wasteful number, since it uses less digits than its factorization.

78722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5632.

The product of its digits is 1568, while the sum is 26.

The square root of 78722 is about 280.5744108075. The cubic root of 78722 is about 42.8580137389.

The spelling of 78722 in words is "seventy-eight thousand, seven hundred twenty-two".