28140533 has 8 divisors (see below), whose sum is σ = 29027328. Its totient is φ = 27264384.

The previous prime is 28140521. The next prime is 28140557. The reversal of 28140533 is 33504182.

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 28140533 - 2⁴ = 28140517 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 (28140583) 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, 2885 + ... + 8037.

It is an arithmetic number, because the mean of its divisors is an integer number (3628416).

Almost surely, 2^28140533 is an apocalyptic number.

It is an amenable number.

28140533 is a deficient number, since it is larger than the sum of its proper divisors (886795).

28140533 is a wasteful number, since it uses less digits than its factorization.

28140533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5323.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 28140533 is about 5304.7651220389. The cubic root of 28140533 is about 304.1660745678.

The spelling of 28140533 in words is "twenty-eight million, one hundred forty thousand, five hundred thirty-three".