28120359 has 4 divisors (see below), whose sum is σ = 37493816. Its totient is φ = 18746904.

The previous prime is 28120327. The next prime is 28120373. The reversal of 28120359 is 95302182.

It is a happy number.

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

It is not a de Polignac number, because 28120359 - 2⁵ = 28120327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28120759) 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 3 ways as a sum of consecutive naturals, for example, 4686724 + ... + 4686729.

It is an arithmetic number, because the mean of its divisors is an integer number (9373454).

Almost surely, 2^28120359 is an apocalyptic number.

28120359 is a deficient number, since it is larger than the sum of its proper divisors (9373457).

28120359 is an equidigital number, since it uses as much as digits as its factorization.

28120359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373456.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 28120359 is about 5302.8632831707. The cubic root of 28120359 is about 304.0933714514.

The spelling of 28120359 in words is "twenty-eight million, one hundred twenty thousand, three hundred fifty-nine".