82405140 has 24 divisors (see below), whose sum is σ = 230734560. Its totient is φ = 21974688.

The previous prime is 82405111. The next prime is 82405163. The reversal of 82405140 is 4150428.

82405140 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

82405140 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 82405140.

It is a congruent number.

It is an unprimeable number.

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, 686650 + ... + 686769.

It is an arithmetic number, because the mean of its divisors is an integer number (9613940).

Almost surely, 2^82405140 is an apocalyptic number.

It is an amenable number.

82405140 is an abundant number, since it is smaller than the sum of its proper divisors (148329420).

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

82405140 is a wasteful number, since it uses less digits than its factorization.

82405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373431 (or 1373429 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 82405140 is about 9077.7276892403. The cubic root of 82405140 is about 435.1624706883.

Adding to 82405140 its reverse (4150428), we get a palindrome (86555568).

The spelling of 82405140 in words is "eighty-two million, four hundred five thousand, one hundred forty".