923520 has 128 divisors (see below), whose sum is σ = 3255840. Its totient is φ = 221184.

The previous prime is 923513. The next prime is 923539. The reversal of 923520 is 25329.

It is a Cunningham number, because it is equal to 31⁴-1.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

923520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24942 + ... + 24978.

2⁹²³⁵²⁰ 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 923520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627920).

923520 is an abundant number, since it is smaller than the sum of its proper divisors (2332320).

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

923520 is a wasteful number, since it uses less digits than its factorization.

923520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 923520 is about 960.9994797085. Note that the first 3 decimals coincide. The cubic root of 923520 is about 97.3827650750.

Adding to 923520 its reverse (25329), we get a palindrome (948849).

The spelling of 923520 in words is "nine hundred twenty-three thousand, five hundred twenty".