3881890 has 16 divisors (see below), whose sum is σ = 7355520. Its totient is φ = 1470960.

The previous prime is 3881887. The next prime is 3881951. The reversal of 3881890 is 981883.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10026 + ... + 10405.

It is an arithmetic number, because the mean of its divisors is an integer number (459720).

Almost surely, 2^3881890 is an apocalyptic number.

3881890 is a deficient number, since it is larger than the sum of its proper divisors (3473630).

3881890 is a wasteful number, since it uses less digits than its factorization.

3881890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20457.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 3881890 is about 1970.2512530132. The cubic root of 3881890 is about 157.1620704567.

It can be divided in two parts, 388 and 1890, that added together give a triangular number (2278 = T₆₇).

The spelling of 3881890 in words is "three million, eight hundred eighty-one thousand, eight hundred ninety".