82808740 has 48 divisors (see below), whose sum is σ = 207389952. Its totient is φ = 27156096.

The previous prime is 82808731. The next prime is 82808743. The reversal of 82808740 is 4780828.

It is a self number, because there is not a number n which added to its sum of digits gives 82808740.

It is not an unprimeable number, because it can be changed into a prime (82808743) 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, 9639 + ... + 16078.

It is an arithmetic number, because the mean of its divisors is an integer number (4320624).

Almost surely, 2^82808740 is an apocalyptic number.

It is an amenable number.

82808740 is an abundant number, since it is smaller than the sum of its proper divisors (124581212).

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

82808740 is a wasteful number, since it uses less digits than its factorization.

82808740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25756 (or 25754 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 82808740 is about 9099.9307689674. The cubic root of 82808740 is about 435.8717533758.

It can be divided in two parts, 8280 and 8740, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 82808740 in words is "eighty-two million, eight hundred eight thousand, seven hundred forty".