7278849 has 16 divisors (see below), whose sum is σ = 10938240. Its totient is φ = 4782960.

The previous prime is 7278847. The next prime is 7278857. The reversal of 7278849 is 9488727.

It is not a de Polignac number, because 7278849 - 2¹ = 7278847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7278841) 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, 19 + ... + 3815.

It is an arithmetic number, because the mean of its divisors is an integer number (683640).

Almost surely, 2^7278849 is an apocalyptic number.

It is an amenable number.

7278849 is a deficient number, since it is larger than the sum of its proper divisors (3659391).

7278849 is a wasteful number, since it uses less digits than its factorization.

7278849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877 (or 3871 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 7278849 is about 2697.9342097242. The cubic root of 7278849 is about 193.8002070371.

The spelling of 7278849 in words is "seven million, two hundred seventy-eight thousand, eight hundred forty-nine".