28142956 has 12 divisors (see below), whose sum is σ = 52147368. Its totient is φ = 13243712.

The previous prime is 28142953. The next prime is 28142981. The reversal of 28142956 is 65924182.

It is not an unprimeable number, because it can be changed into a prime (28142953) 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, 206866 + ... + 207001.

It is an arithmetic number, because the mean of its divisors is an integer number (4345614).

Almost surely, 2^28142956 is an apocalyptic number.

It is an amenable number.

28142956 is a deficient number, since it is larger than the sum of its proper divisors (24004412).

28142956 is a wasteful number, since it uses less digits than its factorization.

28142956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413888 (or 413886 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 28142956 is about 5304.9934966972. The cubic root of 28142956 is about 304.1748042442.

The spelling of 28142956 in words is "twenty-eight million, one hundred forty-two thousand, nine hundred fifty-six".