32397820 has 72 divisors (see below), whose sum is σ = 85264704. Its totient is φ = 10249344.

The previous prime is 32397773. The next prime is 32397851. The reversal of 32397820 is 2879323.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11469 + ... + 14011.

It is an arithmetic number, because the mean of its divisors is an integer number (1184232).

Almost surely, 2^32397820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32397820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42632352).

32397820 is an abundant number, since it is smaller than the sum of its proper divisors (52866884).

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

32397820 is a wasteful number, since it uses less digits than its factorization.

32397820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579 (or 2570 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 32397820 is about 5691.9082916013. The cubic root of 32397820 is about 318.7904206077.

The spelling of 32397820 in words is "thirty-two million, three hundred ninety-seven thousand, eight hundred twenty".