28387833 has 8 divisors (see below), whose sum is σ = 38415648. Its totient is φ = 18642624.

The previous prime is 28387787. The next prime is 28387861. The reversal of 28387833 is 33878382.

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

It is not a de Polignac number, because 28387833 - 2⁹ = 28387321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28387133) 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, 70416 + ... + 70817.

It is an arithmetic number, because the mean of its divisors is an integer number (4801956).

Almost surely, 2^28387833 is an apocalyptic number.

It is an amenable number.

28387833 is a deficient number, since it is larger than the sum of its proper divisors (10027815).

28387833 is a wasteful number, since it uses less digits than its factorization.

28387833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141303.

The product of its digits is 193536, while the sum is 42.

The square root of 28387833 is about 5328.0233670659. The cubic root of 28387833 is about 305.0544845780.

The spelling of 28387833 in words is "twenty-eight million, three hundred eighty-seven thousand, eight hundred thirty-three".