28158073 has 8 divisors (see below), whose sum is σ = 28985792. Its totient is φ = 27333936.

The previous prime is 28158061. The next prime is 28158083. The reversal of 28158073 is 37085182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28158073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28158083) 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, 28636 + ... + 29602.

It is an arithmetic number, because the mean of its divisors is an integer number (3623224).

Almost surely, 2^28158073 is an apocalyptic number.

It is an amenable number.

28158073 is a deficient number, since it is larger than the sum of its proper divisors (827719).

28158073 is an equidigital number, since it uses as much as digits as its factorization.

28158073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 28158073 is about 5306.4180950996. The cubic root of 28158073 is about 304.2292570346.

The spelling of 28158073 in words is "twenty-eight million, one hundred fifty-eight thousand, seventy-three".