28750027 has 4 divisors (see below), whose sum is σ = 28870560. Its totient is φ = 28629496.

The previous prime is 28750019. The next prime is 28750031. The reversal of 28750027 is 72005782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28750027 - 2³ = 28750019 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28750067) 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, 59908 + ... + 60385.

It is an arithmetic number, because the mean of its divisors is an integer number (7217640).

Almost surely, 2^28750027 is an apocalyptic number.

28750027 is a deficient number, since it is larger than the sum of its proper divisors (120533).

28750027 is a wasteful number, since it uses less digits than its factorization.

28750027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120532.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 28750027 is about 5361.9051651442. The cubic root of 28750027 is about 306.3463796611.

The spelling of 28750027 in words is "twenty-eight million, seven hundred fifty thousand, twenty-seven".