28142922 has 16 divisors (see below), whose sum is σ = 59596992. Its totient is φ = 8829120.

The previous prime is 28142911. The next prime is 28142929. The reversal of 28142922 is 22924182.

It is a self number, because there is not a number n which added to its sum of digits gives 28142922.

It is not an unprimeable number, because it can be changed into a prime (28142929) 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, 137854 + ... + 138057.

It is an arithmetic number, because the mean of its divisors is an integer number (3724812).

Almost surely, 2^28142922 is an apocalyptic number.

28142922 is an abundant number, since it is smaller than the sum of its proper divisors (31454070).

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

28142922 is a wasteful number, since it uses less digits than its factorization.

28142922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275933.

The product of its digits is 4608, while the sum is 30.

The square root of 28142922 is about 5304.9902921683. The cubic root of 28142922 is about 304.1746817512.

The spelling of 28142922 in words is "twenty-eight million, one hundred forty-two thousand, nine hundred twenty-two".