7281328 has 20 divisors (see below), whose sum is σ = 14153608. Its totient is φ = 3628800.

The previous prime is 7281301. The next prime is 7281353. The reversal of 7281328 is 8231827.

It is a self number, because there is not a number n which added to its sum of digits gives 7281328.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6403 + ... + 7453.

Almost surely, 2^7281328 is an apocalyptic number.

It is an amenable number.

7281328 is a deficient number, since it is larger than the sum of its proper divisors (6872280).

7281328 is a wasteful number, since it uses less digits than its factorization.

7281328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492 (or 1486 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 7281328 is about 2698.3935961976. The cubic root of 7281328 is about 193.8222057617.

The spelling of 7281328 in words is "seven million, two hundred eighty-one thousand, three hundred twenty-eight".