28518884 has 24 divisors (see below), whose sum is σ = 51744000. Its totient is φ = 13739040.

The previous prime is 28518881. The next prime is 28518899. The reversal of 28518884 is 48881582.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28518881) 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 7 ways as a sum of consecutive naturals, for example, 42947 + ... + 43605.

It is an arithmetic number, because the mean of its divisors is an integer number (2156000).

Almost surely, 2^28518884 is an apocalyptic number.

It is an amenable number.

28518884 is a deficient number, since it is larger than the sum of its proper divisors (23225116).

28518884 is a wasteful number, since it uses less digits than its factorization.

28518884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1041 counting only the distinct ones).

The product of its digits is 163840, while the sum is 44.

The square root of 28518884 is about 5340.3074817842. The cubic root of 28518884 is about 305.5231869526.

The spelling of 28518884 in words is "twenty-eight million, five hundred eighteen thousand, eight hundred eighty-four".