28888626 has 64 divisors (see below), whose sum is σ = 66487680. Its totient is φ = 8294400.

The previous prime is 28888619. The next prime is 28888649. The reversal of 28888626 is 62688882.

It is an unprimeable number.

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, 149586 + ... + 149778.

It is an arithmetic number, because the mean of its divisors is an integer number (1038870).

Almost surely, 2^28888626 is an apocalyptic number.

28888626 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28888626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33243840).

28888626 is an abundant number, since it is smaller than the sum of its proper divisors (37599054).

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

28888626 is a wasteful number, since it uses less digits than its factorization.

28888626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its digits is 589824, while the sum is 48.

The square root of 28888626 is about 5374.8140432949. The cubic root of 28888626 is about 306.8378720033.

The spelling of 28888626 in words is "twenty-eight million, eight hundred eighty-eight thousand, six hundred twenty-six".