3984867 has 6 divisors (see below), whose sum is σ = 5755932. Its totient is φ = 2656572.

The previous prime is 3984859. The next prime is 3984917. The reversal of 3984867 is 7684893.

It is a happy number.

It is not a de Polignac number, because 3984867 - 2³ = 3984859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3984467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221373 + ... + 221390.

It is an arithmetic number, because the mean of its divisors is an integer number (959322).

Almost surely, 2^3984867 is an apocalyptic number.

3984867 is a deficient number, since it is larger than the sum of its proper divisors (1771065).

3984867 is a wasteful number, since it uses less digits than its factorization.

3984867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442769 (or 442766 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 3984867 is about 1996.2131649701. The cubic root of 3984867 is about 158.5396677145.

It can be divided in two parts, 3984 and 867, that added together give a triangular number (4851 = T₉₈).

The spelling of 3984867 in words is "three million, nine hundred eighty-four thousand, eight hundred sixty-seven".