86717828 has 6 divisors (see below), whose sum is σ = 151756206. Its totient is φ = 43358912.

The previous prime is 86717809. The next prime is 86717831. The reversal of 86717828 is 82871768.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 84309124 + 2408704 = 9182^2 + 1552^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10839725 + ... + 10839732.

It is an arithmetic number, because the mean of its divisors is an integer number (25292701).

Almost surely, 2^86717828 is an apocalyptic number.

It is an amenable number.

86717828 is a deficient number, since it is larger than the sum of its proper divisors (65038378).

86717828 is a wasteful number, since it uses less digits than its factorization.

86717828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21679461 (or 21679459 counting only the distinct ones).

The product of its digits is 301056, while the sum is 47.

The square root of 86717828 is about 9312.2407614924. The cubic root of 86717828 is about 442.6251944482.

The spelling of 86717828 in words is "eighty-six million, seven hundred seventeen thousand, eight hundred twenty-eight".