9172240 has 80 divisors (see below), whose sum is σ = 26605440. Its totient is φ = 2856960.

The previous prime is 9172237. The next prime is 9172243. The reversal of 9172240 is 422719.

9172240 = 242² + 243² + ... + 346².

It is an interprime number because it is at equal distance from previous prime (9172237) and next prime (9172243).

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

It is not an unprimeable number, because it can be changed into a prime (9172243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5416 + ... + 6904.

It is an arithmetic number, because the mean of its divisors is an integer number (332568).

Almost surely, 2^9172240 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 9172240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13302720).

9172240 is an abundant number, since it is smaller than the sum of its proper divisors (17433200).

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

9172240 is a wasteful number, since it uses less digits than its factorization.

9172240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 9172240 is about 3028.5706199460. The cubic root of 9172240 is about 209.3269456807.

Adding to 9172240 its reverse (422719), we get a palindrome (9594959).

The spelling of 9172240 in words is "nine million, one hundred seventy-two thousand, two hundred forty".