28042112 has 96 divisors (see below), whose sum is σ = 69070320. Its totient is φ = 11268096.

The previous prime is 28042099. The next prime is 28042123. The reversal of 28042112 is 21124082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106493 + ... + 106755.

Almost surely, 2^28042112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28042112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34535160).

28042112 is an abundant number, since it is smaller than the sum of its proper divisors (41028208).

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

28042112 is a wasteful number, since it uses less digits than its factorization.

28042112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 28042112 is about 5295.4803370421. The cubic root of 28042112 is about 303.8110552583.

Adding to 28042112 its reverse (21124082), we get a palindrome (49166194).

The spelling of 28042112 in words is "twenty-eight million, forty-two thousand, one hundred twelve".