3280991 has 6 divisors (see below), whose sum is σ = 3816720. Its totient is φ = 2812236.

The previous prime is 3280969. The next prime is 3281011. The reversal of 3280991 is 1990823.

It is not a de Polignac number, because 3280991 - 2¹⁴ = 3264607 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 (3280961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33431 + ... + 33528.

It is an arithmetic number, because the mean of its divisors is an integer number (636120).

Almost surely, 2^3280991 is an apocalyptic number.

3280991 is a deficient number, since it is larger than the sum of its proper divisors (535729).

3280991 is an equidigital number, since it uses as much as digits as its factorization.

3280991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66973 (or 66966 counting only the distinct ones).

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

The square root of 3280991 is about 1811.3506010709. The cubic root of 3280991 is about 148.5941389364.

The spelling of 3280991 in words is "three million, two hundred eighty thousand, nine hundred ninety-one".