82860815 has 4 divisors (see below), whose sum is σ = 99432984. Its totient is φ = 66288648.

The previous prime is 82860781. The next prime is 82860821. The reversal of 82860815 is 51806828.

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

It is a cyclic number.

It is not a de Polignac number, because 82860815 - 2¹⁸ = 82598671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8286077 + ... + 8286086.

It is an arithmetic number, because the mean of its divisors is an integer number (24858246).

Almost surely, 2^82860815 is an apocalyptic number.

82860815 is a deficient number, since it is larger than the sum of its proper divisors (16572169).

82860815 is a wasteful number, since it uses less digits than its factorization.

82860815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16572168.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 82860815 is about 9102.7916047771. The cubic root of 82860815 is about 435.9631014842.

The spelling of 82860815 in words is "eighty-two million, eight hundred sixty thousand, eight hundred fifteen".