7287278987 has 4 divisors (see below), whose sum is σ = 7290691176. Its totient is φ = 7283866800.

The previous prime is 7287278953. The next prime is 7287278989. The reversal of 7287278987 is 7898727827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7898727827 = 23 ⋅343422949.

It is a cyclic number.

It is not a de Polignac number, because 7287278987 - 2⁸ = 7287278731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7287278989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702889 + ... + 1707162.

It is an arithmetic number, because the mean of its divisors is an integer number (1822672794).

Almost surely, 2^7287278987 is an apocalyptic number.

7287278987 is a deficient number, since it is larger than the sum of its proper divisors (3412189).

7287278987 is a wasteful number, since it uses less digits than its factorization.

7287278987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412188.

The product of its digits is 44255232, while the sum is 65.

The square root of 7287278987 is about 85365.5608954806. The cubic root of 7287278987 is about 1938.7499463654.

The spelling of 7287278987 in words is "seven billion, two hundred eighty-seven million, two hundred seventy-eight thousand, nine hundred eighty-seven".