82028281 has 16 divisors (see below), whose sum is σ = 91183104. Its totient is φ = 73396224.

The previous prime is 82028267. The next prime is 82028291. The reversal of 82028281 is 18282028.

It is a cyclic number.

It is not a de Polignac number, because 82028281 - 2¹⁷ = 81897209 is a prime.

It is a super-2 number, since 2×82028281² = 13457277767629922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82028291) 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, 74920 + ... + 76006.

It is an arithmetic number, because the mean of its divisors is an integer number (5698944).

Almost surely, 2^82028281 is an apocalyptic number.

It is an amenable number.

82028281 is a deficient number, since it is larger than the sum of its proper divisors (9154823).

82028281 is a wasteful number, since it uses less digits than its factorization.

82028281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 82028281 is about 9056.9465605136. The cubic root of 82028281 is about 434.4980884787.

The spelling of 82028281 in words is "eighty-two million, twenty-eight thousand, two hundred eighty-one".