28094013 has 32 divisors (see below), whose sum is σ = 44593920. Its totient is φ = 17418240.

The previous prime is 28094009. The next prime is 28094021. The reversal of 28094013 is 31049082.

It is not a de Polignac number, because 28094013 - 2² = 28094009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28094083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44208 + ... + 44838.

It is an arithmetic number, because the mean of its divisors is an integer number (1393560).

Almost surely, 2^28094013 is an apocalyptic number.

It is an amenable number.

28094013 is a deficient number, since it is larger than the sum of its proper divisors (16499907).

28094013 is a wasteful number, since it uses less digits than its factorization.

28094013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28094013 is about 5300.3785713853. The cubic root of 28094013 is about 303.9983732888.

The spelling of 28094013 in words is "twenty-eight million, ninety-four thousand, thirteen".