28142158 has 8 divisors (see below), whose sum is σ = 46050840. Its totient is φ = 12791880.

The previous prime is 28142137. The next prime is 28142159. The reversal of 28142158 is 85124182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28142159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639573 + ... + 639616.

It is an arithmetic number, because the mean of its divisors is an integer number (5756355).

Almost surely, 2^28142158 is an apocalyptic number.

28142158 is a deficient number, since it is larger than the sum of its proper divisors (17908682).

28142158 is a wasteful number, since it uses less digits than its factorization.

28142158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279202.

The product of its digits is 5120, while the sum is 31.

The square root of 28142158 is about 5304.9182840078. The cubic root of 28142158 is about 304.1719292349.

The spelling of 28142158 in words is "twenty-eight million, one hundred forty-two thousand, one hundred fifty-eight".