82243140 has 48 divisors (see below), whose sum is σ = 263179392. Its totient is φ = 18798336.

The previous prime is 82243129. The next prime is 82243141. The reversal of 82243140 is 4134228.

It is a self number, because there is not a number n which added to its sum of digits gives 82243140.

It is not an unprimeable number, because it can be changed into a prime (82243141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97489 + ... + 98328.

It is an arithmetic number, because the mean of its divisors is an integer number (5482904).

Almost surely, 2^82243140 is an apocalyptic number.

It is an amenable number.

82243140 is an abundant number, since it is smaller than the sum of its proper divisors (180936252).

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

82243140 is a wasteful number, since it uses less digits than its factorization.

82243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195836 (or 195834 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 82243140 is about 9068.8003616796. The cubic root of 82243140 is about 434.8771221169.

Adding to 82243140 its reverse (4134228), we get a palindrome (86377368).

The spelling of 82243140 in words is "eighty-two million, two hundred forty-three thousand, one hundred forty".