82028111 has 16 divisors (see below), whose sum is σ = 99740160. Its totient is φ = 66487680.

The previous prime is 82028101. The next prime is 82028119. The reversal of 82028111 is 11182028.

82028111 = T₃₀₉₈ + T₃₀₉₉ + ... + T₃₁₁₄.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-82028111 is a prime.

It is a super-2 number, since 2×82028111² = 13457221988456642, 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 (82028119) 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, 7991 + ... + 15096.

It is an arithmetic number, because the mean of its divisors is an integer number (6233760).

Almost surely, 2^82028111 is an apocalyptic number.

82028111 is a deficient number, since it is larger than the sum of its proper divisors (17712049).

82028111 is a wasteful number, since it uses less digits than its factorization.

82028111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23134.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 82028111 is about 9056.9371754473. The cubic root of 82028111 is about 434.4977883191.

The spelling of 82028111 in words is "eighty-two million, twenty-eight thousand, one hundred eleven".