28047893 has 8 divisors (see below), whose sum is σ = 28386912. Its totient is φ = 27711216.

The previous prime is 28047889. The next prime is 28047907. The reversal of 28047893 is 39874082.

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 28047893 - 2² = 28047889 is a prime.

It is a super-3 number, since 3×28047893³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28047893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047863) 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, 35246 + ... + 36032.

It is an arithmetic number, because the mean of its divisors is an integer number (3548364).

Almost surely, 2^28047893 is an apocalyptic number.

It is an amenable number.

28047893 is a deficient number, since it is larger than the sum of its proper divisors (339019).

28047893 is a wasteful number, since it uses less digits than its factorization.

28047893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 28047893 is about 5296.0261517481. The cubic root of 28047893 is about 303.8319311351.

The spelling of 28047893 in words is "twenty-eight million, forty-seven thousand, eight hundred ninety-three".