3028991 has 4 divisors (see below), whose sum is σ = 3461712. Its totient is φ = 2596272.

The previous prime is 3028973. The next prime is 3028997. The reversal of 3028991 is 1998203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1998203 = 661 ⋅3023.

It is a de Polignac number, because none of the positive numbers 2^k-3028991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3028997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216350 + ... + 216363.

It is an arithmetic number, because the mean of its divisors is an integer number (865428).

Almost surely, 2^3028991 is an apocalyptic number.

3028991 is a deficient number, since it is larger than the sum of its proper divisors (432721).

3028991 is an equidigital number, since it uses as much as digits as its factorization.

3028991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432720.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 3028991 is about 1740.3996667432. The cubic root of 3028991 is about 144.6880491328.

The spelling of 3028991 in words is "three million, twenty-eight thousand, nine hundred ninety-one".