82028815 has 32 divisors (see below), whose sum is σ = 111398976. Its totient is φ = 57461760.

The previous prime is 82028813. The next prime is 82028827. The reversal of 82028815 is 51882028.

It is a happy number.

It is not a de Polignac number, because 82028815 - 2¹ = 82028813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82028813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351939 + ... + 352171.

It is an arithmetic number, because the mean of its divisors is an integer number (3481218).

Almost surely, 2^82028815 is an apocalyptic number.

82028815 is a deficient number, since it is larger than the sum of its proper divisors (29370161).

82028815 is a wasteful number, since it uses less digits than its factorization.

82028815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 82028815 is about 9056.9760405999. The cubic root of 82028815 is about 434.4990313302.

The spelling of 82028815 in words is "eighty-two million, twenty-eight thousand, eight hundred fifteen".