82897820 has 24 divisors (see below), whose sum is σ = 175004928. Its totient is φ = 32984000.

The previous prime is 82897811. The next prime is 82897823. The reversal of 82897820 is 2879828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82897823) 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, 7031 + ... + 14670.

It is an arithmetic number, because the mean of its divisors is an integer number (7291872).

Almost surely, 2^82897820 is an apocalyptic number.

It is an amenable number.

82897820 is an abundant number, since it is smaller than the sum of its proper divisors (92107108).

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

82897820 is a wasteful number, since it uses less digits than its factorization.

82897820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21901 (or 21899 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 82897820 is about 9104.8239961023. The cubic root of 82897820 is about 436.0279910767.

The spelling of 82897820 in words is "eighty-two million, eight hundred ninety-seven thousand, eight hundred twenty".