3984818 has 4 divisors (see below), whose sum is σ = 5977230. Its totient is φ = 1992408.

The previous prime is 3984809. The next prime is 3984823. The reversal of 3984818 is 8184893.

Added to its reverse (8184893) it gives a triangular number (12169711 = T₄₉₃₃).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8184893 = 59 ⋅138727.

It can be written as a sum of positive squares in only one way, i.e., 3972049 + 12769 = 1993^2 + 113^2 .

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 as a sum of consecutive naturals, namely, 996203 + ... + 996206.

Almost surely, 2^3984818 is an apocalyptic number.

3984818 is a deficient number, since it is larger than the sum of its proper divisors (1992412).

3984818 is a wasteful number, since it uses less digits than its factorization.

3984818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992411.

The product of its digits is 55296, while the sum is 41.

The square root of 3984818 is about 1996.2008916940. The cubic root of 3984818 is about 158.5390178831.

Adding to 3984818 its reverse (8184893), we get a triangular number (12169711 = T₄₉₃₃).

The spelling of 3984818 in words is "three million, nine hundred eighty-four thousand, eight hundred eighteen".