28549893 has 8 divisors (see below), whose sum is σ = 38951968. Its totient is φ = 18590544.

The previous prime is 28549883. The next prime is 28549897. The reversal of 28549893 is 39894582.

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

It is not a de Polignac number, because 28549893 - 2⁵ = 28549861 is a prime.

It is a super-2 number, since 2×28549893² = 1630192780622898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28549897) 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, 110530 + ... + 110787.

It is an arithmetic number, because the mean of its divisors is an integer number (4868996).

Almost surely, 2^28549893 is an apocalyptic number.

It is an amenable number.

28549893 is a deficient number, since it is larger than the sum of its proper divisors (10402075).

28549893 is a wasteful number, since it uses less digits than its factorization.

28549893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221363.

The product of its digits is 622080, while the sum is 48.

The square root of 28549893 is about 5343.2099902587. The cubic root of 28549893 is about 305.6338801205.

The spelling of 28549893 in words is "twenty-eight million, five hundred forty-nine thousand, eight hundred ninety-three".