82857270 has 64 divisors (see below), whose sum is σ = 208811520. Its totient is φ = 21041504.

The previous prime is 82857253. The next prime is 82857277. The reversal of 82857270 is 7275828.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82857277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 364897 + ... + 365123.

It is an arithmetic number, because the mean of its divisors is an integer number (3262680).

Almost surely, 2^82857270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82857270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104405760).

82857270 is an abundant number, since it is smaller than the sum of its proper divisors (125954250).

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

82857270 is a wasteful number, since it uses less digits than its factorization.

82857270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 82857270 is about 9102.5968822089. The cubic root of 82857270 is about 435.9568841858.

The spelling of 82857270 in words is "eighty-two million, eight hundred fifty-seven thousand, two hundred seventy".