28271142 has 12 divisors (see below), whose sum is σ = 61254180. Its totient is φ = 9423708.

The previous prime is 28271137. The next prime is 28271179. The reversal of 28271142 is 24117282.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 785292 + ... + 785327.

It is an arithmetic number, because the mean of its divisors is an integer number (5104515).

Almost surely, 2^28271142 is an apocalyptic number.

28271142 is an abundant number, since it is smaller than the sum of its proper divisors (32983038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28271142 is a wasteful number, since it uses less digits than its factorization.

28271142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570627 (or 1570624 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 28271142 is about 5317.0614064538. The cubic root of 28271142 is about 304.6359249823.

It can be divided in two parts, 2827 and 1142, that added together give a square (3969 = 63²).

The spelling of 28271142 in words is "twenty-eight million, two hundred seventy-one thousand, one hundred forty-two".