3890891 has 4 divisors (see below), whose sum is σ = 3949032. Its totient is φ = 3832752.

The previous prime is 3890879. The next prime is 3890927. The reversal of 3890891 is 1980983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3890891 - 2¹⁰ = 3889867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3890851) 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, 28970 + ... + 29103.

It is an arithmetic number, because the mean of its divisors is an integer number (987258).

Almost surely, 2^3890891 is an apocalyptic number.

3890891 is a deficient number, since it is larger than the sum of its proper divisors (58141).

3890891 is an equidigital number, since it uses as much as digits as its factorization.

3890891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58140.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 3890891 is about 1972.5341568652. The cubic root of 3890891 is about 157.2834480879.

The spelling of 3890891 in words is "three million, eight hundred ninety thousand, eight hundred ninety-one".