4087986 has 32 divisors (see below), whose sum is σ = 9427968. Its totient is φ = 1157520.

The previous prime is 4087969. The next prime is 4087991. The reversal of 4087986 is 6897804.

It is a happy number.

4087986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 5131 + ... + 5873.

It is an arithmetic number, because the mean of its divisors is an integer number (294624).

Almost surely, 2^4087986 is an apocalyptic number.

4087986 is an abundant number, since it is smaller than the sum of its proper divisors (5339982).

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

4087986 is a wasteful number, since it uses less digits than its factorization.

4087986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 4087986 is about 2021.8768508492. The cubic root of 4087986 is about 159.8955829132.

It can be divided in two parts, 408798 and 6, that added together give a palindrome (408804).

The spelling of 4087986 in words is "four million, eighty-seven thousand, nine hundred eighty-six".