28550788 has 24 divisors (see below), whose sum is σ = 57352064. Its totient is φ = 12182400.

The previous prime is 28550779. The next prime is 28550789. The reversal of 28550788 is 88705582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28550789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4633 + ... + 8863.

Almost surely, 2^28550788 is an apocalyptic number.

28550788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28550788 is an abundant number, since it is smaller than the sum of its proper divisors (28801276).

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

28550788 is a wasteful number, since it uses less digits than its factorization.

28550788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483 (or 4481 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 28550788 is about 5343.2937407558. The cubic root of 28550788 is about 305.6370738215.

The spelling of 28550788 in words is "twenty-eight million, five hundred fifty thousand, seven hundred eighty-eight".