923440 has 80 divisors (see below), whose sum is σ = 2624832. Its totient is φ = 294912.

The previous prime is 923437. The next prime is 923441. The reversal of 923440 is 44329.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (923441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9472 + ... + 9568.

2⁹²³⁴⁴⁰ 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 923440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312416).

923440 is an abundant number, since it is smaller than the sum of its proper divisors (1701392).

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

923440 is a wasteful number, since it uses less digits than its factorization.

923440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 923440 is about 960.9578554755. The cubic root of 923440 is about 97.3799530637.

Adding to 923440 its reverse (44329), we get a palindrome (967769).

The spelling of 923440 in words is "nine hundred twenty-three thousand, four hundred forty".