28885788 has 48 divisors (see below), whose sum is σ = 79299360. Its totient is φ = 9061632.

The previous prime is 28885783. The next prime is 28885793. The reversal of 28885788 is 88758882.

It is an interprime number because it is at equal distance from previous prime (28885783) and next prime (28885793).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6031 + ... + 9702.

It is an arithmetic number, because the mean of its divisors is an integer number (1652070).

Almost surely, 2^28885788 is an apocalyptic number.

It is an amenable number.

28885788 is an abundant number, since it is smaller than the sum of its proper divisors (50413572).

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

28885788 is a wasteful number, since it uses less digits than its factorization.

28885788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15763 (or 15755 counting only the distinct ones).

The product of its digits is 2293760, while the sum is 54.

The square root of 28885788 is about 5374.5500276767. The cubic root of 28885788 is about 306.8278238227.

The spelling of 28885788 in words is "twenty-eight million, eight hundred eighty-five thousand, seven hundred eighty-eight".