28055142 has 12 divisors (see below), whose sum is σ = 60786180. Its totient is φ = 9351708.

The previous prime is 28055123. The next prime is 28055143. The reversal of 28055142 is 24155082.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 779292 + ... + 779327.

It is an arithmetic number, because the mean of its divisors is an integer number (5065515).

Almost surely, 2^28055142 is an apocalyptic number.

28055142 is an abundant number, since it is smaller than the sum of its proper divisors (32731038).

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

28055142 is a wasteful number, since it uses less digits than its factorization.

28055142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558627 (or 1558624 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 28055142 is about 5296.7104885957. The cubic root of 28055142 is about 303.8581040810.

The spelling of 28055142 in words is "twenty-eight million, fifty-five thousand, one hundred forty-two".