28038873 has 4 divisors (see below), whose sum is σ = 37385168. Its totient is φ = 18692580.

The previous prime is 28038839. The next prime is 28038877. The reversal of 28038873 is 37883082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28038873 - 2⁶ = 28038809 is a prime.

It is a super-2 number, since 2×28038873² = 1572356798220258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28038877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4673143 + ... + 4673148.

It is an arithmetic number, because the mean of its divisors is an integer number (9346292).

Almost surely, 2^28038873 is an apocalyptic number.

It is an amenable number.

28038873 is a deficient number, since it is larger than the sum of its proper divisors (9346295).

28038873 is an equidigital number, since it uses as much as digits as its factorization.

28038873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9346294.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 28038873 is about 5295.1745013739. The cubic root of 28038873 is about 303.7993575909.

The spelling of 28038873 in words is "twenty-eight million, thirty-eight thousand, eight hundred seventy-three".