4018986 has 12 divisors (see below), whose sum is σ = 8707842. Its totient is φ = 1339656.

The previous prime is 4018981. The next prime is 4019003. The reversal of 4018986 is 6898104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 938961 = 1755^2 + 969^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4018986.

It is not an unprimeable number, because it can be changed into a prime (4018981) 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, 111621 + ... + 111656.

Almost surely, 2^4018986 is an apocalyptic number.

4018986 is an abundant number, since it is smaller than the sum of its proper divisors (4688856).

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

4018986 is a wasteful number, since it uses less digits than its factorization.

4018986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223285 (or 223282 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 4018986 is about 2004.7408810118. The cubic root of 4018986 is about 158.9908621781.

The spelling of 4018986 in words is "four million, eighteen thousand, nine hundred eighty-six".