3172240 has 40 divisors (see below), whose sum is σ = 7767360. Its totient is φ = 1201536.

The previous prime is 3172237. The next prime is 3172243. The reversal of 3172240 is 422713.

It is an interprime number because it is at equal distance from previous prime (3172237) and next prime (3172243).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (3172243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477 + ... + 2563.

It is an arithmetic number, because the mean of its divisors is an integer number (194184).

Almost surely, 2^3172240 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 3172240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3883680).

3172240 is an abundant number, since it is smaller than the sum of its proper divisors (4595120).

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

3172240 is a wasteful number, since it uses less digits than its factorization.

3172240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 3172240 is about 1781.0783250604. The cubic root of 3172240 is about 146.9339021332.

Adding to 3172240 its reverse (422713), we get a palindrome (3594953).

The spelling of 3172240 in words is "three million, one hundred seventy-two thousand, two hundred forty".