28277142 has 16 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 9416552.

The previous prime is 28277141. The next prime is 28277147. The reversal of 28277142 is 24177282.

It is a super-3 number, since 3×28277142³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28277141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7843 + ... + 10865.

It is an arithmetic number, because the mean of its divisors is an integer number (3538080).

Almost surely, 2^28277142 is an apocalyptic number.

28277142 is an abundant number, since it is smaller than the sum of its proper divisors (28332138).

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

28277142 is a wasteful number, since it uses less digits than its factorization.

28277142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587.

The product of its digits is 12544, while the sum is 33.

The square root of 28277142 is about 5317.6255979525. The cubic root of 28277142 is about 304.6574744745.

The spelling of 28277142 in words is "twenty-eight million, two hundred seventy-seven thousand, one hundred forty-two".