28092481 has 4 divisors (see below), whose sum is σ = 28271572. Its totient is φ = 27913392.

The previous prime is 28092451. The next prime is 28092487. The reversal of 28092481 is 18429082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21538881 + 6553600 = 4641^2 + 2560^2 .

It is a cyclic number.

It is not a de Polignac number, because 28092481 - 2⁹ = 28091969 is a prime.

It is a super-2 number, since 2×28092481² = 1578374977470722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28092487) 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, 89310 + ... + 89623.

It is an arithmetic number, because the mean of its divisors is an integer number (7067893).

Almost surely, 2^28092481 is an apocalyptic number.

It is an amenable number.

28092481 is a deficient number, since it is larger than the sum of its proper divisors (179091).

28092481 is a wasteful number, since it uses less digits than its factorization.

28092481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179090.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 28092481 is about 5300.2340514358. The cubic root of 28092481 is about 303.9928473906.

The spelling of 28092481 in words is "twenty-eight million, ninety-two thousand, four hundred eighty-one".