28298088 has 144 divisors (see below), whose sum is σ = 96166980. Its totient is φ = 7451136.

The previous prime is 28298063. The next prime is 28298093. The reversal of 28298088 is 88089282.

It can be written as a sum of positive squares in 2 ways, for example, as 21734244 + 6563844 = 4662^2 + 2562^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45556 + ... + 46172.

Almost surely, 2^28298088 is an apocalyptic number.

28298088 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 28298088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48083490).

28298088 is an abundant number, since it is smaller than the sum of its proper divisors (67868892).

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

28298088 is a wasteful number, since it uses less digits than its factorization.

28298088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 28298088 is about 5319.5947214050. The cubic root of 28298088 is about 304.7326798644.

It can be divided in two parts, 28 and 298088, that added together give a square (298116 = 546²).

The spelling of 28298088 in words is "twenty-eight million, two hundred ninety-eight thousand, eighty-eight".