87826 has 4 divisors (see below), whose sum is σ = 131742. Its totient is φ = 43912.

The previous prime is 87811. The next prime is 87833. The reversal of 87826 is 62878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 65025 + 22801 = 255^2 + 151^2 .

It is an unprimeable number.

87826 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21955 + ... + 21958.

2⁸⁷⁸²⁶ is an apocalyptic number.

87826 is a deficient number, since it is larger than the sum of its proper divisors (43916).

87826 is a wasteful number, since it uses less digits than its factorization.

87826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43915.

The product of its digits is 5376, while the sum is 31.

The square root of 87826 is about 296.3545174280. The cubic root of 87826 is about 44.4502663670.

The spelling of 87826 in words is "eighty-seven thousand, eight hundred twenty-six".