128030868 has 144 divisors (see below), whose sum is σ = 396591104. Its totient is φ = 35341920.

The previous prime is 128030863. The next prime is 128030869. The reversal of 128030868 is 868030821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128030863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 210621 + ... + 211227.

Almost surely, 2^128030868 is an apocalyptic number.

128030868 is a gapful number since it is divisible by the number (18) 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 128030868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198295552).

128030868 is an abundant number, since it is smaller than the sum of its proper divisors (268560236).

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

128030868 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 128030868 = (286818300)₉.

128030868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 128030868 is about 11315.0726025068. The cubic root of 128030868 is about 504.0089284133.

The spelling of 128030868 in words is "one hundred twenty-eight million, thirty thousand, eight hundred sixty-eight".