7280224 has 36 divisors (see below), whose sum is σ = 16676604. Its totient is φ = 3119424.

The previous prime is 7280197. The next prime is 7280263. The reversal of 7280224 is 4220827.

It is a super-2 number, since 2×7280224² = 106003322980352, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 754 + ... + 3889.

It is an arithmetic number, because the mean of its divisors is an integer number (463239).

Almost surely, 2^7280224 is an apocalyptic number.

It is an amenable number.

7280224 is an abundant number, since it is smaller than the sum of its proper divisors (9396380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7280224 is a wasteful number, since it uses less digits than its factorization.

7280224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667 (or 4652 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 7280224 is about 2698.1890222888. The cubic root of 7280224 is about 193.8124094475.

The spelling of 7280224 in words is "seven million, two hundred eighty thousand, two hundred twenty-four".