28973033 has 4 divisors (see below), whose sum is σ = 29519748. Its totient is φ = 28426320.

The previous prime is 28973029. The next prime is 28973039. The reversal of 28973033 is 33037982.

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 18905104 + 10067929 = 4348^2 + 3173^2 .

It is a cyclic number.

It is not a de Polignac number, because 28973033 - 2² = 28973029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28972984 and 28973002.

It is not an unprimeable number, because it can be changed into a prime (28973039) 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, 273278 + ... + 273383.

It is an arithmetic number, because the mean of its divisors is an integer number (7379937).

Almost surely, 2^28973033 is an apocalyptic number.

It is an amenable number.

28973033 is a deficient number, since it is larger than the sum of its proper divisors (546715).

28973033 is an equidigital number, since it uses as much as digits as its factorization.

28973033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546714.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 28973033 is about 5382.6604016973. The cubic root of 28973033 is about 307.1364218075.

The spelling of 28973033 in words is "twenty-eight million, nine hundred seventy-three thousand, thirty-three".