28445788 has 48 divisors (see below), whose sum is σ = 58947840. Its totient is φ = 11759616.

The previous prime is 28445783. The next prime is 28445801. The reversal of 28445788 is 88754482.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28445783) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 110556 + ... + 110812.

It is an arithmetic number, because the mean of its divisors is an integer number (1228080).

Almost surely, 2^28445788 is an apocalyptic number.

28445788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28445788 is an abundant number, since it is smaller than the sum of its proper divisors (30502052).

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

28445788 is a wasteful number, since it uses less digits than its factorization.

28445788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its digits is 573440, while the sum is 46.

The square root of 28445788 is about 5333.4592901793. The cubic root of 28445788 is about 305.2619374818.

The spelling of 28445788 in words is "twenty-eight million, four hundred forty-five thousand, seven hundred eighty-eight".