7218472 has 16 divisors (see below), whose sum is σ = 14331060. Its totient is φ = 3396864.

The previous prime is 7218469. The next prime is 7218479. The reversal of 7218472 is 2748127.

It can be written as a sum of positive squares in 2 ways, for example, as 7001316 + 217156 = 2646^2 + 466^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7218479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26403 + ... + 26674.

Almost surely, 2^7218472 is an apocalyptic number.

It is an amenable number.

7218472 is a deficient number, since it is larger than the sum of its proper divisors (7112588).

7218472 is a wasteful number, since it uses less digits than its factorization.

7218472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53100 (or 53096 counting only the distinct ones).

The product of its digits is 6272, while the sum is 31.

The square root of 7218472 is about 2686.7214221054. The cubic root of 7218472 is about 193.2628703452.

The spelling of 7218472 in words is "seven million, two hundred eighteen thousand, four hundred seventy-two".