28888650 has 120 divisors (see below), whose sum is σ = 91824480. Its totient is φ = 6596640.

The previous prime is 28888649. The next prime is 28888663. The reversal of 28888650 is 5688882.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 28888596 and 28888605.

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 59 ways as a sum of consecutive naturals, for example, 27841 + ... + 28859.

It is an arithmetic number, because the mean of its divisors is an integer number (765204).

Almost surely, 2^28888650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28888650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45912240).

28888650 is an abundant number, since it is smaller than the sum of its proper divisors (62935830).

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

28888650 is a wasteful number, since it uses less digits than its factorization.

28888650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The square root of 28888650 is about 5374.8162759298. The cubic root of 28888650 is about 306.8379569746.

The spelling of 28888650 in words is "twenty-eight million, eight hundred eighty-eight thousand, six hundred fifty".