3291428 has 24 divisors (see below), whose sum is σ = 6720000. Its totient is φ = 1410024.

The previous prime is 3291401. The next prime is 3291437. The reversal of 3291428 is 8241923.

It is a self number, because there is not a number n which added to its sum of digits gives 3291428.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (280000).

Almost surely, 2^3291428 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 3291428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3360000).

3291428 is an abundant number, since it is smaller than the sum of its proper divisors (3428572).

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

3291428 is a wasteful number, since it uses less digits than its factorization.

3291428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424 (or 2408 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 3291428 is about 1814.2293129591. The cubic root of 3291428 is about 148.7515340096.

The spelling of 3291428 in words is "three million, two hundred ninety-one thousand, four hundred twenty-eight".