28045893 has 8 divisors (see below), whose sum is σ = 37550656. Its totient is φ = 18619200.

The previous prime is 28045879. The next prime is 28045931. The reversal of 28045893 is 39854082.

It is a happy number.

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

It is not a de Polignac number, because 28045893 - 2⁵ = 28045861 is a prime.

It is a super-2 number, since 2×28045893² = 1573144228334898, 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 (28045093) 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, 18673 + ... + 20118.

It is an arithmetic number, because the mean of its divisors is an integer number (4693832).

Almost surely, 2^28045893 is an apocalyptic number.

It is an amenable number.

28045893 is a deficient number, since it is larger than the sum of its proper divisors (9504763).

28045893 is a wasteful number, since it uses less digits than its factorization.

28045893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39035.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 28045893 is about 5295.8373275621. The cubic root of 28045893 is about 303.8247092224.

The spelling of 28045893 in words is "twenty-eight million, forty-five thousand, eight hundred ninety-three".