28056142 has 4 divisors (see below), whose sum is σ = 42084216. Its totient is φ = 14028070.

The previous prime is 28056097. The next prime is 28056143. The reversal of 28056142 is 24165082.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28056142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28056143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7014034 + ... + 7014037.

It is an arithmetic number, because the mean of its divisors is an integer number (10521054).

Almost surely, 2^28056142 is an apocalyptic number.

28056142 is a deficient number, since it is larger than the sum of its proper divisors (14028074).

28056142 is a wasteful number, since it uses less digits than its factorization.

28056142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14028073.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28056142 is about 5296.8048859666. The cubic root of 28056142 is about 303.8617142866.

The spelling of 28056142 in words is "twenty-eight million, fifty-six thousand, one hundred forty-two".