82021028690 has 64 divisors (see below), whose sum is σ = 152427391488. Its totient is φ = 31760313600.

The previous prime is 82021028659. The next prime is 82021028711. The reversal of 82021028690 is 9682012028.

It is a super-2 number, since 2×82021028690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59391800 + ... + 59393180.

It is an arithmetic number, because the mean of its divisors is an integer number (2381677992).

Almost surely, 2^82021028690 is an apocalyptic number.

82021028690 is a deficient number, since it is larger than the sum of its proper divisors (70406362798).

82021028690 is a wasteful number, since it uses less digits than its factorization.

82021028690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 82021028690 in words is "eighty-two billion, twenty-one million, twenty-eight thousand, six hundred ninety".