3981854 has 4 divisors (see below), whose sum is σ = 5972784. Its totient is φ = 1990926.

The previous prime is 3981847. The next prime is 3981863. The reversal of 3981854 is 4581893.

3981854 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×3981854² = 31710322554632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995462 + ... + 995465.

It is an arithmetic number, because the mean of its divisors is an integer number (1493196).

Almost surely, 2^3981854 is an apocalyptic number.

3981854 is a deficient number, since it is larger than the sum of its proper divisors (1990930).

3981854 is a wasteful number, since it uses less digits than its factorization.

3981854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990929.

The product of its digits is 34560, while the sum is 38.

The square root of 3981854 is about 1995.4583433387. The cubic root of 3981854 is about 158.4996998007.

The spelling of 3981854 in words is "three million, nine hundred eighty-one thousand, eight hundred fifty-four".