28573333 has 4 divisors (see below), whose sum is σ = 28850848. Its totient is φ = 28295820.

The previous prime is 28573319. The next prime is 28573357. The reversal of 28573333 is 33337582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33337582 = 2 ⋅16668791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28573333 is a prime.

It is a Duffinian number.

28573333 is a modest number, since divided by 3333 gives 2857 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28573313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138603 + ... + 138808.

It is an arithmetic number, because the mean of its divisors is an integer number (7212712).

Almost surely, 2^28573333 is an apocalyptic number.

It is an amenable number.

28573333 is a deficient number, since it is larger than the sum of its proper divisors (277515).

28573333 is a wasteful number, since it uses less digits than its factorization.

28573333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277514.

The product of its digits is 45360, while the sum is 34.

The square root of 28573333 is about 5345.4029782609. The cubic root of 28573333 is about 305.7175009644.

The spelling of 28573333 in words is "twenty-eight million, five hundred seventy-three thousand, three hundred thirty-three".