28144142 has 8 divisors (see below), whose sum is σ = 45463656. Its totient is φ = 12989592.

The previous prime is 28144139. The next prime is 28144147. The reversal of 28144142 is 24144182.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 1082467 = 28144142 / (2 + 8 + 1 + 4 + 4 + 1 + 4 + 2).

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, 541208 + ... + 541259.

It is an arithmetic number, because the mean of its divisors is an integer number (5682957).

Almost surely, 2^28144142 is an apocalyptic number.

28144142 is a deficient number, since it is larger than the sum of its proper divisors (17319514).

28144142 is a wasteful number, since it uses less digits than its factorization.

28144142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082482.

The product of its digits is 2048, while the sum is 26.

The square root of 28144142 is about 5305.1052769950. The cubic root of 28144142 is about 304.1790770275.

The spelling of 28144142 in words is "twenty-eight million, one hundred forty-four thousand, one hundred forty-two".