83820980 has 12 divisors (see below), whose sum is σ = 176024100. Its totient is φ = 33528384.

The previous prime is 83820977. The next prime is 83821013. The reversal of 83820980 is 8902838.

It can be written as a sum of positive squares in 2 ways, for example, as 16613776 + 67207204 = 4076^2 + 8198^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095505 + ... + 2095544.

It is an arithmetic number, because the mean of its divisors is an integer number (14668675).

Almost surely, 2^83820980 is an apocalyptic number.

It is an amenable number.

83820980 is an abundant number, since it is smaller than the sum of its proper divisors (92203120).

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

83820980 is a wasteful number, since it uses less digits than its factorization.

83820980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191058 (or 4191056 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 83820980 is about 9155.3798391984. The cubic root of 83820980 is about 437.6405730589.

The spelling of 83820980 in words is "eighty-three million, eight hundred twenty thousand, nine hundred eighty".