82643500 has 24 divisors (see below), whose sum is σ = 180494496. Its totient is φ = 33057200.

The previous prime is 82643497. The next prime is 82643501. The reversal of 82643500 is 534628.

It is not an unprimeable number, because it can be changed into a prime (82643501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82144 + ... + 83143.

It is an arithmetic number, because the mean of its divisors is an integer number (7520604).

Almost surely, 2^82643500 is an apocalyptic number.

It is an amenable number.

82643500 is an abundant number, since it is smaller than the sum of its proper divisors (97850996).

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

82643500 is a wasteful number, since it uses less digits than its factorization.

82643500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165306 (or 165294 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 82643500 is about 9090.8470452428. The cubic root of 82643500 is about 435.5816414548.

The spelling of 82643500 in words is "eighty-two million, six hundred forty-three thousand, five hundred".