320231232 has 168 divisors, whose sum is σ = 970788000. Its totient is φ = 104633856.

The previous prime is 320231221. The next prime is 320231237. The reversal of 320231232 is 232132023.

It is a happy number.

320231232 is a `hidden beast` number, since 320 + 2 + 312 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320231237) 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, 917394 + ... + 917742.

It is an arithmetic number, because the mean of its divisors is an integer number (5778500).

Almost surely, 2^320231232 is an apocalyptic number.

320231232 is a gapful number since it is divisible by the number (32) 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 320231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485394000).

320231232 is an abundant number, since it is smaller than the sum of its proper divisors (650556768).

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

320231232 is an equidigital number, since it uses as much as digits as its factorization.

320231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 320231232 is about 17895.0057837375. The cubic root of 320231232 is about 684.1550894862.

Adding to 320231232 its reverse (232132023), we get a palindrome (552363255).

The spelling of 320231232 in words is "three hundred twenty million, two hundred thirty-one thousand, two hundred thirty-two".