28142608 has 20 divisors (see below), whose sum is σ = 58721068. Its totient is φ = 12988800.

The previous prime is 28142579. The next prime is 28142623. The reversal of 28142608 is 80624182.

It can be written as a sum of positive squares in 2 ways, for example, as 11102224 + 17040384 = 3332^2 + 4128^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28142608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67443 + ... + 67858.

Almost surely, 2^28142608 is an apocalyptic number.

It is an amenable number.

28142608 is an abundant number, since it is smaller than the sum of its proper divisors (30578460).

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

28142608 is a wasteful number, since it uses less digits than its factorization.

28142608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135322 (or 135316 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28142608 is about 5304.9606973096. The cubic root of 28142608 is about 304.1735504874.

The spelling of 28142608 in words is "twenty-eight million, one hundred forty-two thousand, six hundred eight".