28336788 has 36 divisors (see below), whose sum is σ = 71809920. Its totient is φ = 9421776.

The previous prime is 28336787. The next prime is 28336793. The reversal of 28336788 is 88763382.

28336788 is a `hidden beast` number, since 283 + 367 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28336787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18973 + ... + 20411.

It is an arithmetic number, because the mean of its divisors is an integer number (1994720).

Almost surely, 2^28336788 is an apocalyptic number.

It is an amenable number.

28336788 is an abundant number, since it is smaller than the sum of its proper divisors (43473132).

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

28336788 is a wasteful number, since it uses less digits than its factorization.

28336788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996 (or 1991 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28336788 is about 5323.2309737602. The cubic root of 28336788 is about 304.8715323874.

The spelling of 28336788 in words is "twenty-eight million, three hundred thirty-six thousand, seven hundred eighty-eight".