82307140 has 24 divisors (see below), whose sum is σ = 173015640. Its totient is φ = 32890368.

The previous prime is 82307089. The next prime is 82307143. The reversal of 82307140 is 4170328.

It can be written as a sum of positive squares in 4 ways, for example, as 6512704 + 75794436 = 2552^2 + 8706^2 .

It is not an unprimeable number, because it can be changed into a prime (82307143) 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 7 ways as a sum of consecutive naturals, for example, 37596 + ... + 39724.

It is an arithmetic number, because the mean of its divisors is an integer number (7208985).

Almost surely, 2^82307140 is an apocalyptic number.

It is an amenable number.

82307140 is an abundant number, since it is smaller than the sum of its proper divisors (90708500).

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

82307140 is a wasteful number, since it uses less digits than its factorization.

82307140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071 (or 4069 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 82307140 is about 9072.3282568479. The cubic root of 82307140 is about 434.9898971538.

Adding to 82307140 its reverse (4170328), we get a palindrome (86477468).

The spelling of 82307140 in words is "eighty-two million, three hundred seven thousand, one hundred forty".