897728 has 42 divisors (see below), whose sum is σ = 1952244. Its totient is φ = 409344.

The previous prime is 897727. The next prime is 897751. The reversal of 897728 is 827798.

Its product of digits (56448) is a multiple of the sum of its prime divisors (98).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 897728.

It is not an unprimeable number, because it can be changed into a prime (897727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10775 + ... + 10857.

It is an arithmetic number, because the mean of its divisors is an integer number (46482).

2⁸⁹⁷⁷²⁸ 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 897728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976122).

897728 is an abundant number, since it is smaller than the sum of its proper divisors (1054516).

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

897728 is a wasteful number, since it uses less digits than its factorization.

897728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 98 counting only the distinct ones).

The product of its digits is 56448, while the sum is 41.

The square root of 897728 is about 947.4850922310. The cubic root of 897728 is about 96.4676258553.

The spelling of 897728 in words is "eight hundred ninety-seven thousand, seven hundred twenty-eight".