897440 has 48 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 349440.

The previous prime is 897433. The next prime is 897443. The reversal of 897440 is 44798.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 897397 and 897406.

It is not an unprimeable number, because it can be changed into a prime (897443) 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, 11321 + ... + 11399.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2⁸⁹⁷⁴⁴⁰ is an apocalyptic number.

897440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088640).

897440 is an abundant number, since it is smaller than the sum of its proper divisors (1279840).

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

897440 is a wasteful number, since it uses less digits than its factorization.

897440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 897440 is about 947.3330987567. Note that the first 3 decimals coincide. The cubic root of 897440 is about 96.4573088299.

The spelling of 897440 in words is "eight hundred ninety-seven thousand, four hundred forty".