28653888 has 28 divisors (see below), whose sum is σ = 75813920. Its totient is φ = 9551232.

The previous prime is 28653871. The next prime is 28653893. The reversal of 28653888 is 88835682.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 74428 + ... + 74811.

It is an arithmetic number, because the mean of its divisors is an integer number (2707640).

Almost surely, 2^28653888 is an apocalyptic number.

It is an amenable number.

28653888 is an abundant number, since it is smaller than the sum of its proper divisors (47160032).

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

28653888 is a wasteful number, since it uses less digits than its factorization.

28653888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149254 (or 149244 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The square root of 28653888 is about 5352.9326541626. The cubic root of 28653888 is about 306.0045281059.

The spelling of 28653888 in words is "twenty-eight million, six hundred fifty-three thousand, eight hundred eighty-eight".