82765685 has 8 divisors (see below), whose sum is σ = 99394776. Its totient is φ = 66161920.

The previous prime is 82765679. The next prime is 82765687. The reversal of 82765685 is 58656728.

It can be written as a sum of positive squares in 4 ways, for example, as 18861649 + 63904036 = 4343^2 + 7994^2 .

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

It is not a de Polignac number, because 82765685 - 2⁶ = 82765621 is a prime.

It is a super-2 number, since 2×82765685² = 13700317227038450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82765687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1817 + ... + 12993.

It is an arithmetic number, because the mean of its divisors is an integer number (12424347).

Almost surely, 2^82765685 is an apocalyptic number.

It is an amenable number.

82765685 is a deficient number, since it is larger than the sum of its proper divisors (16629091).

82765685 is a wasteful number, since it uses less digits than its factorization.

82765685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12663.

The product of its digits is 806400, while the sum is 47.

The square root of 82765685 is about 9097.5647840507. The cubic root of 82765685 is about 435.7961989045.

The spelling of 82765685 in words is "eighty-two million, seven hundred sixty-five thousand, six hundred eighty-five".