28032733 has 16 divisors (see below), whose sum is σ = 30523840. Its totient is φ = 25732080.

The previous prime is 28032713. The next prime is 28032751. The reversal of 28032733 is 33723082.

It is not a de Polignac number, because 28032733 - 2¹⁷ = 27901661 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 (28032703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418366 + ... + 418432.

It is an arithmetic number, because the mean of its divisors is an integer number (1907740).

Almost surely, 2^28032733 is an apocalyptic number.

It is an amenable number.

28032733 is a deficient number, since it is larger than the sum of its proper divisors (2491107).

28032733 is an frugal number, since it uses more digits than its factorization.

28032733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 28032733 is about 5294.5946964806. The cubic root of 28032733 is about 303.7771804723. Note that the first 3 decimals are identical.

The spelling of 28032733 in words is "twenty-eight million, thirty-two thousand, seven hundred thirty-three".