3172640 has 48 divisors (see below), whose sum is σ = 7620480. Its totient is φ = 1248000.

The previous prime is 3172627. The next prime is 3172649. The reversal of 3172640 is 462713.

It is not an unprimeable number, because it can be changed into a prime (3172649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12515 + ... + 12765.

It is an arithmetic number, because the mean of its divisors is an integer number (158760).

Almost surely, 2^3172640 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 3172640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3810240).

3172640 is an abundant number, since it is smaller than the sum of its proper divisors (4447840).

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

3172640 is a wasteful number, since it uses less digits than its factorization.

3172640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 3172640 is about 1781.1906130451. The cubic root of 3172640 is about 146.9400776949.

The spelling of 3172640 in words is "three million, one hundred seventy-two thousand, six hundred forty".