7287866 has 16 divisors (see below), whose sum is σ = 11741760. Its totient is φ = 3380160.

The previous prime is 7287859. The next prime is 7287899. The reversal of 7287866 is 6687827.

It is a happy number.

It is a super-2 number, since 2×7287866² = 106225981667912, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 905 + ... + 3923.

It is an arithmetic number, because the mean of its divisors is an integer number (733860).

Almost surely, 2^7287866 is an apocalyptic number.

7287866 is a deficient number, since it is larger than the sum of its proper divisors (4453894).

7287866 is a wasteful number, since it uses less digits than its factorization.

7287866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109.

The product of its digits is 225792, while the sum is 44.

The square root of 7287866 is about 2699.6047858900. The cubic root of 7287866 is about 193.8802002415.

The spelling of 7287866 in words is "seven million, two hundred eighty-seven thousand, eight hundred sixty-six".