82812474 has 48 divisors (see below), whose sum is σ = 190862568. Its totient is φ = 25860096.

The previous prime is 82812473. The next prime is 82812481. The reversal of 82812474 is 47421828.

It can be written as a sum of positive squares in 4 ways, for example, as 80730225 + 2082249 = 8985^2 + 1443^2 .

It is not an unprimeable number, because it can be changed into a prime (82812473) 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 23 ways as a sum of consecutive naturals, for example, 84274 + ... + 85250.

Almost surely, 2^82812474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82812474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95431284).

82812474 is an abundant number, since it is smaller than the sum of its proper divisors (108050094).

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

82812474 is a wasteful number, since it uses less digits than its factorization.

82812474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1276 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 82812474 is about 9100.1359330507. The cubic root of 82812474 is about 435.8783046998.

The spelling of 82812474 in words is "eighty-two million, eight hundred twelve thousand, four hundred seventy-four".