7287278979 has 16 divisors (see below), whose sum is σ = 9784339712. Its totient is φ = 4824253728.

The previous prime is 7287278953. The next prime is 7287278989. The reversal of 7287278979 is 9798727827.

It is a de Polignac number, because none of the positive numbers 2^k-7287278979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7287278909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631449 + ... + 642885.

It is an arithmetic number, because the mean of its divisors is an integer number (611521232).

Almost surely, 2^7287278979 is an apocalyptic number.

7287278979 is a deficient number, since it is larger than the sum of its proper divisors (2497060733).

7287278979 is a wasteful number, since it uses less digits than its factorization.

7287278979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906.

The product of its digits is 49787136, while the sum is 66.

The square root of 7287278979 is about 85365.5608486233. The cubic root of 7287278979 is about 1938.7499456560.

The spelling of 7287278979 in words is "seven billion, two hundred eighty-seven million, two hundred seventy-eight thousand, nine hundred seventy-nine".