3228991 has 4 divisors (see below), whose sum is σ = 3333184. Its totient is φ = 3124800.

The previous prime is 3228983. The next prime is 3229001. The reversal of 3228991 is 1998223.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3228991 - 2³ = 3228983 is a prime.

It is a Duffinian number.

3228991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3228961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52050 + ... + 52111.

It is an arithmetic number, because the mean of its divisors is an integer number (833296).

Almost surely, 2^3228991 is an apocalyptic number.

3228991 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3228991 is a deficient number, since it is larger than the sum of its proper divisors (104193).

3228991 is a wasteful number, since it uses less digits than its factorization.

3228991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104192.

The product of its digits is 7776, while the sum is 34.

The square root of 3228991 is about 1796.9393423263. The cubic root of 3228991 is about 147.8049384231.

The spelling of 3228991 in words is "three million, two hundred twenty-eight thousand, nine hundred ninety-one".