28144141 has 4 divisors (see below), whose sum is σ = 28268352. Its totient is φ = 28019932.

The previous prime is 28144139. The next prime is 28144147. The reversal of 28144141 is 14144182.

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 a cyclic number.

It is not a de Polignac number, because 28144141 - 2¹ = 28144139 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 (28144147) 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, 61765 + ... + 62218.

It is an arithmetic number, because the mean of its divisors is an integer number (7067088).

Almost surely, 2^28144141 is an apocalyptic number.

It is an amenable number.

28144141 is a deficient number, since it is larger than the sum of its proper divisors (124211).

28144141 is a wasteful number, since it uses less digits than its factorization.

28144141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124210.

The product of its digits is 1024, while the sum is 25.

The square root of 28144141 is about 5305.1051827461. The cubic root of 28144141 is about 304.1790734248.

The spelling of 28144141 in words is "twenty-eight million, one hundred forty-four thousand, one hundred forty-one".