7287668 has 24 divisors (see below), whose sum is σ = 13428744. Its totient is φ = 3456000.

The previous prime is 7287647. The next prime is 7287677. The reversal of 7287668 is 8667827.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8464 + 7279204 = 92^2 + 2698^2 .

It is a super-2 number, since 2×7287668² = 106220209756448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5468 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (559531).

Almost surely, 2^7287668 is an apocalyptic number.

It is an amenable number.

7287668 is a deficient number, since it is larger than the sum of its proper divisors (6141076).

7287668 is a wasteful number, since it uses less digits than its factorization.

7287668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283 (or 1281 counting only the distinct ones).

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

The square root of 7287668 is about 2699.5681136063. The cubic root of 7287668 is about 193.8784444176.

The spelling of 7287668 in words is "seven million, two hundred eighty-seven thousand, six hundred sixty-eight".