128817150 has 192 divisors, whose sum is σ = 419973120. Its totient is φ = 25315200.

The previous prime is 128817097. The next prime is 128817179. The reversal of 128817150 is 51718821.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 219157 + ... + 219743.

It is an arithmetic number, because the mean of its divisors is an integer number (2187360).

Almost surely, 2^128817150 is an apocalyptic number.

128817150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128817150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209986560).

128817150 is an abundant number, since it is smaller than the sum of its proper divisors (291155970).

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

128817150 is a wasteful number, since it uses less digits than its factorization.

128817150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 33.

The square root of 128817150 is about 11349.7643147336. The cubic root of 128817150 is about 505.0385880391.

The spelling of 128817150 in words is "one hundred twenty-eight million, eight hundred seventeen thousand, one hundred fifty".