7928281 has 8 divisors (see below), whose sum is σ = 8467200. Its totient is φ = 7407120.

The previous prime is 7928269. The next prime is 7928303. The reversal of 7928281 is 1828297.

7928281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7928281 - 2⁷ = 7928153 is a prime.

It is a super-2 number, since 2×7928281² = 125715279229922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7928281.

It is not an unprimeable number, because it can be changed into a prime (7928201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3511 + ... + 5308.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^7928281 is an apocalyptic number.

It is an amenable number.

7928281 is a deficient number, since it is larger than the sum of its proper divisors (538919).

7928281 is a wasteful number, since it uses less digits than its factorization.

7928281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8879.

The product of its digits is 16128, while the sum is 37.

The square root of 7928281 is about 2815.7203341241. The cubic root of 7928281 is about 199.4005467407.

The spelling of 7928281 in words is "seven million, nine hundred twenty-eight thousand, two hundred eighty-one".