28627788 has 96 divisors (see below), whose sum is σ = 80217088. Its totient is φ = 7776000.

The previous prime is 28627771. The next prime is 28627789. The reversal of 28627788 is 88772682.

It is not an unprimeable number, because it can be changed into a prime (28627789) 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 31 ways as a sum of consecutive naturals, for example, 189513 + ... + 189663.

Almost surely, 2^28627788 is an apocalyptic number.

28627788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28627788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40108544).

28627788 is an abundant number, since it is smaller than the sum of its proper divisors (51589300).

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

28627788 is a wasteful number, since it uses less digits than its factorization.

28627788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 261 counting only the distinct ones).

The product of its digits is 602112, while the sum is 48.

The square root of 28627788 is about 5350.4941827835. The cubic root of 28627788 is about 305.9115896494.

The spelling of 28627788 in words is "twenty-eight million, six hundred twenty-seven thousand, seven hundred eighty-eight".