28048733 has 4 divisors (see below), whose sum is σ = 28068348. Its totient is φ = 28029120.

The previous prime is 28048729. The next prime is 28048739. The reversal of 28048733 is 33784082.

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 12264004 + 15784729 = 3502^2 + 3973^2 .

It is a cyclic number.

It is not a de Polignac number, because 28048733 - 2² = 28048729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28048693 and 28048702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28048739) 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, 7478 + ... + 10583.

It is an arithmetic number, because the mean of its divisors is an integer number (7017087).

Almost surely, 2^28048733 is an apocalyptic number.

It is an amenable number.

28048733 is a deficient number, since it is larger than the sum of its proper divisors (19615).

28048733 is a wasteful number, since it uses less digits than its factorization.

28048733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19614.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28048733 is about 5296.1054558987. The cubic root of 28048733 is about 303.8349642361.

The spelling of 28048733 in words is "twenty-eight million, forty-eight thousand, seven hundred thirty-three".