7278947 has 16 divisors (see below), whose sum is σ = 8145312. Its totient is φ = 6462720.

The previous prime is 7278917. The next prime is 7278949. The reversal of 7278947 is 7498727.

It is a cyclic number.

It is not a de Polignac number, because 7278947 - 2⁶ = 7278883 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7278898 and 7278907.

It is not an unprimeable number, because it can be changed into a prime (7278949) 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, 53063 + ... + 53199.

It is an arithmetic number, because the mean of its divisors is an integer number (509082).

Almost surely, 2^7278947 is an apocalyptic number.

7278947 is a deficient number, since it is larger than the sum of its proper divisors (866365).

7278947 is a wasteful number, since it uses less digits than its factorization.

7278947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278.

The product of its digits is 197568, while the sum is 44.

The square root of 7278947 is about 2697.9523717071. The cubic root of 7278947 is about 193.8010767871.

The spelling of 7278947 in words is "seven million, two hundred seventy-eight thousand, nine hundred forty-seven".