28942888 has 32 divisors (see below), whose sum is σ = 58673160. Its totient is φ = 13305600.

The previous prime is 28942883. The next prime is 28942931. The reversal of 28942888 is 88824982.

It can be written as a sum of positive squares in 4 ways, for example, as 26440164 + 2502724 = 5142^2 + 1582^2 .

It is not an unprimeable number, because it can be changed into a prime (28942883) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40938 + ... + 41638.

Almost surely, 2^28942888 is an apocalyptic number.

It is an amenable number.

28942888 is an abundant number, since it is smaller than the sum of its proper divisors (29730272).

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

28942888 is a wasteful number, since it uses less digits than its factorization.

28942888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1113 counting only the distinct ones).

The product of its digits is 589824, while the sum is 49.

The square root of 28942888 is about 5379.8594777187. The cubic root of 28942888 is about 307.0298647856.

The spelling of 28942888 in words is "twenty-eight million, nine hundred forty-two thousand, eight hundred eighty-eight".