28033837 has 8 divisors (see below), whose sum is σ = 30238880. Its totient is φ = 25835760.

The previous prime is 28033813. The next prime is 28033877. The reversal of 28033837 is 73833082.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28033837 - 2¹⁵ = 28001069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28033877) 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, 9214 + ... + 11872.

It is an arithmetic number, because the mean of its divisors is an integer number (3779860).

Almost surely, 2^28033837 is an apocalyptic number.

It is an amenable number.

28033837 is a deficient number, since it is larger than the sum of its proper divisors (2205043).

28033837 is a wasteful number, since it uses less digits than its factorization.

28033837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 28033837 is about 5294.6989527262. The cubic root of 28033837 is about 303.7811682581.

The spelling of 28033837 in words is "twenty-eight million, thirty-three thousand, eight hundred thirty-seven".