7228385 has 16 divisors (see below), whose sum is σ = 8942400. Its totient is φ = 5606976.

The previous prime is 7228373. The next prime is 7228391. The reversal of 7228385 is 5838227.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7228385 - 2⁶ = 7228321 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31451 + ... + 31679.

It is an arithmetic number, because the mean of its divisors is an integer number (558900).

Almost surely, 2^7228385 is an apocalyptic number.

It is an amenable number.

7228385 is a deficient number, since it is larger than the sum of its proper divisors (1714015).

7228385 is a wasteful number, since it uses less digits than its factorization.

7228385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400.

The product of its digits is 26880, while the sum is 35.

The square root of 7228385 is about 2688.5656026960. The cubic root of 7228385 is about 193.3512980400.

The spelling of 7228385 in words is "seven million, two hundred twenty-eight thousand, three hundred eighty-five".