28273533 has 8 divisors (see below), whose sum is σ = 39915648. Its totient is φ = 17740224.

The previous prime is 28273529. The next prime is 28273541. The reversal of 28273533 is 33537282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28273533 - 2² = 28273529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28273494 and 28273503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28273523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277141 + ... + 277242.

It is an arithmetic number, because the mean of its divisors is an integer number (4989456).

Almost surely, 2^28273533 is an apocalyptic number.

It is an amenable number.

28273533 is a deficient number, since it is larger than the sum of its proper divisors (11642115).

28273533 is a wasteful number, since it uses less digits than its factorization.

28273533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554403.

The product of its digits is 30240, while the sum is 33.

The square root of 28273533 is about 5317.2862439406. The cubic root of 28273533 is about 304.6445128203.

The spelling of 28273533 in words is "twenty-eight million, two hundred seventy-three thousand, five hundred thirty-three".