82481780 has 24 divisors (see below), whose sum is σ = 176482152. Its totient is φ = 32369792.

The previous prime is 82481779. The next prime is 82481813. The reversal of 82481780 is 8718428.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38019556 + 44462224 = 6166^2 + 6668^2 .

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, 37847 + ... + 39966.

It is an arithmetic number, because the mean of its divisors is an integer number (7353423).

Almost surely, 2^82481780 is an apocalyptic number.

It is an amenable number.

82481780 is an abundant number, since it is smaller than the sum of its proper divisors (94000372).

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

82481780 is a wasteful number, since it uses less digits than its factorization.

82481780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77875 (or 77873 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 82481780 is about 9081.9480289198. The cubic root of 82481780 is about 435.2973349209.

The spelling of 82481780 in words is "eighty-two million, four hundred eighty-one thousand, seven hundred eighty".