82945820 has 24 divisors (see below), whose sum is σ = 181760544. Its totient is φ = 31735616.

The previous prime is 82945817. The next prime is 82945847. The reversal of 82945820 is 2854928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89699 + ... + 90618.

It is an arithmetic number, because the mean of its divisors is an integer number (7573356).

Almost surely, 2^82945820 is an apocalyptic number.

It is an amenable number.

82945820 is an abundant number, since it is smaller than the sum of its proper divisors (98814724).

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

82945820 is a wasteful number, since it uses less digits than its factorization.

82945820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180349 (or 180347 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 82945820 is about 9107.4595799268. The cubic root of 82945820 is about 436.1121320321.

The spelling of 82945820 in words is "eighty-two million, nine hundred forty-five thousand, eight hundred twenty".