82785790 has 16 divisors (see below), whose sum is σ = 149669280. Its totient is φ = 32968800.

The previous prime is 82785757. The next prime is 82785797. The reversal of 82785790 is 9758728.

It is a self number, because there is not a number n which added to its sum of digits gives 82785790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82785797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15786 + ... + 20365.

It is an arithmetic number, because the mean of its divisors is an integer number (9354330).

Almost surely, 2^82785790 is an apocalyptic number.

82785790 is a deficient number, since it is larger than the sum of its proper divisors (66883490).

82785790 is a wasteful number, since it uses less digits than its factorization.

82785790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36387.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 82785790 is about 9098.6696829811. The cubic root of 82785790 is about 435.8314831459.

The spelling of 82785790 in words is "eighty-two million, seven hundred eighty-five thousand, seven hundred ninety".