7287986 has 8 divisors (see below), whose sum is σ = 10946460. Its totient is φ = 3639168.

The previous prime is 7287983. The next prime is 7287991. The reversal of 7287986 is 6897827.

It can be written as a sum of positive squares in 2 ways, for example, as 7102225 + 185761 = 2665^2 + 431^2 .

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

It is a super-2 number, since 2×7287986² = 106229479872392, which contains 22 as substring.

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 7287986.

It is not an unprimeable number, because it can be changed into a prime (7287983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71 + ... + 3818.

Almost surely, 2^7287986 is an apocalyptic number.

7287986 is a deficient number, since it is larger than the sum of its proper divisors (3658474).

7287986 is a wasteful number, since it uses less digits than its factorization.

7287986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828.

The product of its digits is 338688, while the sum is 47.

The square root of 7287986 is about 2699.6270112740. The cubic root of 7287986 is about 193.8812643617.

The spelling of 7287986 in words is "seven million, two hundred eighty-seven thousand, nine hundred eighty-six".