9897570 has 48 divisors (see below), whose sum is σ = 27251640. Its totient is φ = 2483712.

The previous prime is 9897541. The next prime is 9897571. The reversal of 9897570 is 757989.

It can be written as a sum of positive squares in 4 ways, for example, as 6796449 + 3101121 = 2607^2 + 1761^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (9897571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1705 + ... + 4764.

Almost surely, 2^9897570 is an apocalyptic number.

9897570 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9897570 is an abundant number, since it is smaller than the sum of its proper divisors (17354070).

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

9897570 is a wasteful number, since it uses less digits than its factorization.

9897570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499 (or 6496 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 9897570 is about 3146.0403684632. The cubic root of 9897570 is about 214.7053472256.

The spelling of 9897570 in words is "nine million, eight hundred ninety-seven thousand, five hundred seventy".