82020775 has 24 divisors (see below), whose sum is σ = 103899600. Its totient is φ = 64220160.

The previous prime is 82020773. The next prime is 82020793. The reversal of 82020775 is 57702028.

It is not a de Polignac number, because 82020775 - 2¹ = 82020773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82020773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361212 + ... + 361438.

It is an arithmetic number, because the mean of its divisors is an integer number (4329150).

Almost surely, 2^82020775 is an apocalyptic number.

82020775 is a deficient number, since it is larger than the sum of its proper divisors (21878825).

82020775 is a wasteful number, since it uses less digits than its factorization.

82020775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 82020775 is about 9056.5321729678. The cubic root of 82020775 is about 434.4848351548.

The spelling of 82020775 in words is "eighty-two million, twenty thousand, seven hundred seventy-five".