28512893 has 8 divisors (see below), whose sum is σ = 31503168. Its totient is φ = 25668544.

The previous prime is 28512881. The next prime is 28512899. The reversal of 28512893 is 39821582.

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 28512893 - 2⁸ = 28512637 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 (28512899) 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, 36071 + ... + 36852.

It is an arithmetic number, because the mean of its divisors is an integer number (3937896).

Almost surely, 2^28512893 is an apocalyptic number.

28512893 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28512893 is a deficient number, since it is larger than the sum of its proper divisors (2990275).

28512893 is a wasteful number, since it uses less digits than its factorization.

28512893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72963.

The product of its digits is 34560, while the sum is 38.

The square root of 28512893 is about 5339.7465295649. The cubic root of 28512893 is about 305.5017915665.

The spelling of 28512893 in words is "twenty-eight million, five hundred twelve thousand, eight hundred ninety-three".