82805784 has 16 divisors (see below), whose sum is σ = 207014520. Its totient is φ = 27601920.

The previous prime is 82805783. The next prime is 82805791. The reversal of 82805784 is 48750828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82805783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1725097 + ... + 1725144.

Almost surely, 2^82805784 is an apocalyptic number.

It is an amenable number.

82805784 is an abundant number, since it is smaller than the sum of its proper divisors (124208736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82805784 is a wasteful number, since it uses less digits than its factorization.

82805784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450250 (or 3450246 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 82805784 is about 9099.7683486999. The cubic root of 82805784 is about 435.8665669175.

The spelling of 82805784 in words is "eighty-two million, eight hundred five thousand, seven hundred eighty-four".