3881390 has 16 divisors (see below), whose sum is σ = 7009632. Its totient is φ = 1547424.

The previous prime is 3881387. The next prime is 3881393. The reversal of 3881390 is 931883.

It is an interprime number because it is at equal distance from previous prime (3881387) and next prime (3881393).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881393) 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, 4472 + ... + 5268.

It is an arithmetic number, because the mean of its divisors is an integer number (438102).

Almost surely, 2^3881390 is an apocalyptic number.

3881390 is a deficient number, since it is larger than the sum of its proper divisors (3128242).

3881390 is a wasteful number, since it uses less digits than its factorization.

3881390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 3881390 is about 1970.1243615569. The cubic root of 3881390 is about 157.1553225058.

The spelling of 3881390 in words is "three million, eight hundred eighty-one thousand, three hundred ninety".