28042688 has 28 divisors (see below), whose sum is σ = 57009792. Its totient is φ = 13678080.

The previous prime is 28042687. The next prime is 28042697. The reversal of 28042688 is 88624082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28042687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2720 + ... + 7967.

It is an arithmetic number, because the mean of its divisors is an integer number (2036064).

Almost surely, 2^28042688 is an apocalyptic number.

It is an amenable number.

28042688 is an abundant number, since it is smaller than the sum of its proper divisors (28967104).

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

28042688 is a wasteful number, since it uses less digits than its factorization.

28042688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740 (or 10730 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 28042688 is about 5295.5347227641. The cubic root of 28042688 is about 303.8131353913.

The spelling of 28042688 in words is "twenty-eight million, forty-two thousand, six hundred eighty-eight".