3281887 has 4 divisors (see below), whose sum is σ = 3750736. Its totient is φ = 2813040.

The previous prime is 3281857. The next prime is 3281909. The reversal of 3281887 is 7881823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7881823 = 29 ⋅271787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3281887 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234414 + ... + 234427.

It is an arithmetic number, because the mean of its divisors is an integer number (937684).

Almost surely, 2^3281887 is an apocalyptic number.

3281887 is a deficient number, since it is larger than the sum of its proper divisors (468849).

3281887 is an equidigital number, since it uses as much as digits as its factorization.

3281887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468848.

The product of its digits is 21504, while the sum is 37.

The square root of 3281887 is about 1811.5979134455. The cubic root of 3281887 is about 148.6076641417.

The spelling of 3281887 in words is "three million, two hundred eighty-one thousand, eight hundred eighty-seven".