28890033 has 8 divisors (see below), whose sum is σ = 38623200. Its totient is φ = 19208448.

The previous prime is 28890031. The next prime is 28890053. The reversal of 28890033 is 33009882.

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

It is not a de Polignac number, because 28890033 - 2¹ = 28890031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28889976 and 28890003.

It is not an unprimeable number, because it can be changed into a prime (28890031) 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, 11568 + ... + 13841.

It is an arithmetic number, because the mean of its divisors is an integer number (4827900).

Almost surely, 2^28890033 is an apocalyptic number.

It is an amenable number.

28890033 is a deficient number, since it is larger than the sum of its proper divisors (9733167).

28890033 is a wasteful number, since it uses less digits than its factorization.

28890033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25791.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28890033 is about 5374.9449299504. The cubic root of 28890033 is about 306.8428533626.

The spelling of 28890033 in words is "twenty-eight million, eight hundred ninety thousand, thirty-three".