28920273 has 8 divisors (see below), whose sum is σ = 39602688. Its totient is φ = 18759024.

The previous prime is 28920263. The next prime is 28920277. The reversal of 28920273 is 37202982.

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

It is not a de Polignac number, because 28920273 - 2⁴ = 28920257 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28920277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130161 + ... + 130382.

It is an arithmetic number, because the mean of its divisors is an integer number (4950336).

Almost surely, 2^28920273 is an apocalyptic number.

It is an amenable number.

28920273 is a deficient number, since it is larger than the sum of its proper divisors (10682415).

28920273 is a wasteful number, since it uses less digits than its factorization.

28920273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260583.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28920273 is about 5377.7572462877. The cubic root of 28920273 is about 306.9498763425.

The spelling of 28920273 in words is "twenty-eight million, nine hundred twenty thousand, two hundred seventy-three".