4389986 has 4 divisors (see below), whose sum is σ = 6584982. Its totient is φ = 2194992.

The previous prime is 4389977. The next prime is 4389989. The reversal of 4389986 is 6899834.

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

It can be written as a sum of positive squares in only one way, i.e., 4389025 + 961 = 2095^2 + 31^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4389986.

It is not an unprimeable number, because it can be changed into a prime (4389989) by changing a digit.

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, 1097495 + ... + 1097498.

Almost surely, 2^4389986 is an apocalyptic number.

4389986 is a deficient number, since it is larger than the sum of its proper divisors (2194996).

4389986 is a wasteful number, since it uses less digits than its factorization.

4389986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194995.

The product of its digits is 373248, while the sum is 47.

The square root of 4389986 is about 2095.2293430553. The cubic root of 4389986 is about 163.7398463102.

The spelling of 4389986 in words is "four million, three hundred eighty-nine thousand, nine hundred eighty-six".