28900533 has 8 divisors (see below), whose sum is σ = 38576896. Its totient is φ = 19245600.

The previous prime is 28900523. The next prime is 28900537. The reversal of 28900533 is 33500982.

It is a happy number.

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

It is not a de Polignac number, because 28900533 - 2¹⁰ = 28899509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28900533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28900537) 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, 1888 + ... + 7833.

It is an arithmetic number, because the mean of its divisors is an integer number (4822112).

Almost surely, 2^28900533 is an apocalyptic number.

It is an amenable number.

28900533 is a deficient number, since it is larger than the sum of its proper divisors (9676363).

28900533 is an equidigital number, since it uses as much as digits as its factorization.

28900533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10715.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 28900533 is about 5375.9215954104. The cubic root of 28900533 is about 306.8800225796.

The spelling of 28900533 in words is "twenty-eight million, nine hundred thousand, five hundred thirty-three".