28147033 has 4 divisors (see below), whose sum is σ = 28833588. Its totient is φ = 27460480.

The previous prime is 28147001. The next prime is 28147073. The reversal of 28147033 is 33074182.

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 2866249 + 25280784 = 1693^2 + 5028^2 .

It is a cyclic number.

It is not a de Polignac number, because 28147033 - 2⁵ = 28147001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28146992 and 28147010.

It is not an unprimeable number, because it can be changed into a prime (28147073) 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, 343216 + ... + 343297.

It is an arithmetic number, because the mean of its divisors is an integer number (7208397).

Almost surely, 2^28147033 is an apocalyptic number.

It is an amenable number.

28147033 is a deficient number, since it is larger than the sum of its proper divisors (686555).

28147033 is an equidigital number, since it uses as much as digits as its factorization.

28147033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686554.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 28147033 is about 5305.3777433845. The cubic root of 28147033 is about 304.1894918840.

The spelling of 28147033 in words is "twenty-eight million, one hundred forty-seven thousand, thirty-three".