3881445 has 8 divisors (see below), whose sum is σ = 6210336. Its totient is φ = 2070096.

The previous prime is 3881443. The next prime is 3881461. The reversal of 3881445 is 5441883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3881445 - 2¹ = 3881443 is a prime.

3881445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129367 + ... + 129396.

It is an arithmetic number, because the mean of its divisors is an integer number (776292).

Almost surely, 2^3881445 is an apocalyptic number.

It is an amenable number.

3881445 is a deficient number, since it is larger than the sum of its proper divisors (2328891).

3881445 is a wasteful number, since it uses less digits than its factorization.

3881445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258771.

The product of its digits is 15360, while the sum is 33.

The square root of 3881445 is about 1970.1383200172. The cubic root of 3881445 is about 157.1560648088.

The spelling of 3881445 in words is "three million, eight hundred eighty-one thousand, four hundred forty-five".