82140500 has 48 divisors (see below), whose sum is σ = 193209744. Its totient is φ = 30326400.

The previous prime is 82140497. The next prime is 82140517. The reversal of 82140500 is 504128.

It can be written as a sum of positive squares in 8 ways, for example, as 60777616 + 21362884 = 7796^2 + 4622^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182 + ... + 12818.

It is an arithmetic number, because the mean of its divisors is an integer number (4025203).

Almost surely, 2^82140500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82140500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96604872).

82140500 is an abundant number, since it is smaller than the sum of its proper divisors (111069244).

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

82140500 is a wasteful number, since it uses less digits than its factorization.

82140500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12669 (or 12657 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 82140500 is about 9063.1396325997. The cubic root of 82140500 is about 434.6961369336.

Adding to 82140500 its reverse (504128), we get a palindrome (82644628).

The spelling of 82140500 in words is "eighty-two million, one hundred forty thousand, five hundred".