3188881 has 4 divisors (see below), whose sum is σ = 3327552. Its totient is φ = 3050212.

The previous prime is 3188879. The next prime is 3188893. The reversal of 3188881 is 1888813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3188881 - 2¹ = 3188879 is a prime.

It is a super-2 number, since 2×3188881² = 20337924064322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3188881.

It is not an unprimeable number, because it can be changed into a prime (3188821) 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, 69301 + ... + 69346.

It is an arithmetic number, because the mean of its divisors is an integer number (831888).

Almost surely, 2^3188881 is an apocalyptic number.

It is an amenable number.

3188881 is a deficient number, since it is larger than the sum of its proper divisors (138671).

3188881 is a wasteful number, since it uses less digits than its factorization.

3188881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138670.

The product of its digits is 12288, while the sum is 37.

The square root of 3188881 is about 1785.7438226129. The cubic root of 3188881 is about 147.1903837695.

The spelling of 3188881 in words is "three million, one hundred eighty-eight thousand, eight hundred eighty-one".