9897620 has 24 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 3936800.

The previous prime is 9897617. The next prime is 9897631. The reversal of 9897620 is 267989.

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, 2525 + ... + 5115.

It is an arithmetic number, because the mean of its divisors is an integer number (870912).

Almost surely, 2^9897620 is an apocalyptic number.

It is an amenable number.

9897620 is an abundant number, since it is smaller than the sum of its proper divisors (11004268).

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

9897620 is a wasteful number, since it uses less digits than its factorization.

9897620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2789 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 9897620 is about 3146.0483149500. The cubic root of 9897620 is about 214.7057087706.

The spelling of 9897620 in words is "nine million, eight hundred ninety-seven thousand, six hundred twenty".