82973780 has 12 divisors (see below), whose sum is σ = 174244980. Its totient is φ = 33189504.

The previous prime is 82973777. The next prime is 82973801. The reversal of 82973780 is 8737928.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50665924 + 32307856 = 7118^2 + 5684^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2074325 + ... + 2074364.

It is an arithmetic number, because the mean of its divisors is an integer number (14520415).

Almost surely, 2^82973780 is an apocalyptic number.

It is an amenable number.

82973780 is an abundant number, since it is smaller than the sum of its proper divisors (91271200).

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

82973780 is a wasteful number, since it uses less digits than its factorization.

82973780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148698 (or 4148696 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 82973780 is about 9108.9944560308. The cubic root of 82973780 is about 436.1611291781.

The spelling of 82973780 in words is "eighty-two million, nine hundred seventy-three thousand, seven hundred eighty".