4047986 has 4 divisors (see below), whose sum is σ = 6071982. Its totient is φ = 2023992.

The previous prime is 4047983. The next prime is 4047991. The reversal of 4047986 is 6897404.

It is a happy number.

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., 3728761 + 319225 = 1931^2 + 565^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4047983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011995 + ... + 1011998.

Almost surely, 2^4047986 is an apocalyptic number.

4047986 is a deficient number, since it is larger than the sum of its proper divisors (2023996).

4047986 is a wasteful number, since it uses less digits than its factorization.

4047986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023995.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 4047986 is about 2011.9607352033. The cubic root of 4047986 is about 159.3723588438.

The spelling of 4047986 in words is "four million, forty-seven thousand, nine hundred eighty-six".