82540869 has 16 divisors (see below), whose sum is σ = 112254720. Its totient is φ = 53933760.

The previous prime is 82540853. The next prime is 82540891. The reversal of 82540869 is 96804528.

It is not a de Polignac number, because 82540869 - 2⁴ = 82540853 is a prime.

It is a super-2 number, since 2×82540869² = 13625990110550322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82540869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82540369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66547 + ... + 67775.

It is an arithmetic number, because the mean of its divisors is an integer number (7015920).

Almost surely, 2^82540869 is an apocalyptic number.

It is an amenable number.

82540869 is a deficient number, since it is larger than the sum of its proper divisors (29713851).

82540869 is a wasteful number, since it uses less digits than its factorization.

82540869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 82540869 is about 9085.2005481442. The cubic root of 82540869 is about 435.4012574458.

The spelling of 82540869 in words is "eighty-two million, five hundred forty thousand, eight hundred sixty-nine".