87578 has 4 divisors (see below), whose sum is σ = 131370. Its totient is φ = 43788.

The previous prime is 87559. The next prime is 87583.

87578 is nontrivially palindromic in base 10.

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., 61009 + 26569 = 247^2 + 163^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21893 + ... + 21896.

2⁸⁷⁵⁷⁸ is an apocalyptic number.

87578 is a deficient number, since it is larger than the sum of its proper divisors (43792).

87578 is a wasteful number, since it uses less digits than its factorization.

87578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43791.

The product of its digits is 15680, while the sum is 35.

The square root of 87578 is about 295.9358038494. The cubic root of 87578 is about 44.4083878858.

The spelling of 87578 in words is "eighty-seven thousand, five hundred seventy-eight".