87722 has 8 divisors (see below), whose sum is σ = 137376. Its totient is φ = 41932.

The previous prime is 87721. The next prime is 87739. The reversal of 87722 is 22778.

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

It is a plaindrome in base 4 and base 16.

It is a nialpdrome in base 10.

It is a zygodrome in base 3 and base 4.

It is a junction number, because it is equal to n+sod(n) for n = 87691 and 87700.

It is not an unprimeable number, because it can be changed into a prime (87721) 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, 908 + ... + 999.

It is an arithmetic number, because the mean of its divisors is an integer number (17172).

2⁸⁷⁷²² is an apocalyptic number.

87722 is a deficient number, since it is larger than the sum of its proper divisors (49654).

87722 is a wasteful number, since it uses less digits than its factorization.

87722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932.

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

The square root of 87722 is about 296.1789999308. The cubic root of 87722 is about 44.4327140338.

It can be divided in two parts, 8 and 7722, that multiplied together give a triangular number (61776 = T₃₅₁).

The spelling of 87722 in words is "eighty-seven thousand, seven hundred twenty-two".