3217428 has 48 divisors (see below), whose sum is σ = 8619520. Its totient is φ = 1037880.

The previous prime is 3217421. The next prime is 3217429. The reversal of 3217428 is 8247123.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

3217428 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3217421) 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 15 ways as a sum of consecutive naturals, for example, 103773 + ... + 103803.

Almost surely, 2^3217428 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 3217428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4309760).

3217428 is an abundant number, since it is smaller than the sum of its proper divisors (5402092).

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

3217428 is an equidigital number, since it uses as much as digits as its factorization.

3217428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 36 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 3217428 is about 1793.7190415447. The cubic root of 3217428 is about 147.6282978330.

The spelling of 3217428 in words is "three million, two hundred seventeen thousand, four hundred twenty-eight".