82801786 has 8 divisors (see below), whose sum is σ = 128485620. Its totient is φ = 39973248.

The previous prime is 82801769. The next prime is 82801787. The reversal of 82801786 is 68710828.

It can be written as a sum of positive squares in 2 ways, for example, as 82246761 + 555025 = 9069^2 + 745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×82801786² = 13712271529579592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82801787) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 713751 + ... + 713866.

Almost surely, 2^82801786 is an apocalyptic number.

82801786 is a deficient number, since it is larger than the sum of its proper divisors (45683834).

82801786 is a wasteful number, since it uses less digits than its factorization.

82801786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427648.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 82801786 is about 9099.5486701264. The cubic root of 82801786 is about 435.8595520187.

The spelling of 82801786 in words is "eighty-two million, eight hundred one thousand, seven hundred eighty-six".