23170320 has 160 divisors (see below), whose sum is σ = 84637440. Its totient is φ = 5806080.

The previous prime is 23170319. The next prime is 23170339. The reversal of 23170320 is 2307132.

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

It is a junction number, because it is equal to n+sod(n) for n = 23170293 and 23170302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36405 + ... + 37035.

It is an arithmetic number, because the mean of its divisors is an integer number (528984).

Almost surely, 2^23170320 is an apocalyptic number.

23170320 is a gapful number since it is divisible by the number (20) 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 23170320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42318720).

23170320 is an abundant number, since it is smaller than the sum of its proper divisors (61467120).

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

23170320 is a wasteful number, since it uses less digits than its factorization.

23170320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 23170320 is about 4813.5558581988. Note that the first 3 decimals coincide. The cubic root of 23170320 is about 285.0869540769.

Adding to 23170320 its reverse (2307132), we get a palindrome (25477452).

The spelling of 23170320 in words is "twenty-three million, one hundred seventy thousand, three hundred twenty".