4393986 has 8 divisors (see below), whose sum is σ = 8787984. Its totient is φ = 1464660.

The previous prime is 4393981. The next prime is 4393999. The reversal of 4393986 is 6893934.

It is a sphenic number, since it is the product of 3 distinct primes.

4393986 is an admirable number.

It is a super-2 number, since 2×4393986² = 38614225936392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4393981) 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, 366160 + ... + 366171.

It is an arithmetic number, because the mean of its divisors is an integer number (1098498).

Almost surely, 2^4393986 is an apocalyptic number.

4393986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4393986 is a wasteful number, since it uses less digits than its factorization.

4393986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732336.

The product of its digits is 139968, while the sum is 42.

The square root of 4393986 is about 2096.1836751583. The cubic root of 4393986 is about 163.7895625326.

The spelling of 4393986 in words is "four million, three hundred ninety-three thousand, nine hundred eighty-six".