28023141 has 4 divisors (see below), whose sum is σ = 37364192. Its totient is φ = 18682092.

The previous prime is 28023133. The next prime is 28023169. The reversal of 28023141 is 14132082.

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 28023141 - 2³ = 28023133 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 (28023241) 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, 4670521 + ... + 4670526.

It is an arithmetic number, because the mean of its divisors is an integer number (9341048).

Almost surely, 2^28023141 is an apocalyptic number.

It is an amenable number.

28023141 is a deficient number, since it is larger than the sum of its proper divisors (9341051).

28023141 is an equidigital number, since it uses as much as digits as its factorization.

28023141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9341050.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28023141 is about 5293.6887894926. The cubic root of 28023141 is about 303.7425285635.

The spelling of 28023141 in words is "twenty-eight million, twenty-three thousand, one hundred forty-one".