28578033 has 24 divisors (see below), whose sum is σ = 47405280. Its totient is φ = 16407360.

The previous prime is 28578031. The next prime is 28578047. The reversal of 28578033 is 33087582.

It is not a de Polignac number, because 28578033 - 2¹ = 28578031 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28578031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5716 + ... + 9477.

It is an arithmetic number, because the mean of its divisors is an integer number (1975220).

Almost surely, 2^28578033 is an apocalyptic number.

It is an amenable number.

28578033 is a deficient number, since it is larger than the sum of its proper divisors (18827247).

28578033 is a wasteful number, since it uses less digits than its factorization.

28578033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15229 (or 15226 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28578033 is about 5345.8425902752. The cubic root of 28578033 is about 305.7342624377.

The spelling of 28578033 in words is "twenty-eight million, five hundred seventy-eight thousand, thirty-three".