128958012 has 72 divisors (see below), whose sum is σ = 340835040. Its totient is φ = 41059200.

The previous prime is 128957993. The next prime is 128958017. The reversal of 128958012 is 210859821.

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

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128958017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104833 + ... + 106055.

It is an arithmetic number, because the mean of its divisors is an integer number (4733820).

Almost surely, 2^128958012 is an apocalyptic number.

128958012 is a gapful number since it is divisible by the number (12) 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 128958012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170417520).

128958012 is an abundant number, since it is smaller than the sum of its proper divisors (211877028).

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

128958012 is a wasteful number, since it uses less digits than its factorization.

128958012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 128958012 is about 11355.9681225336. The cubic root of 128958012 is about 505.2226081287. Note that the first 3 decimals are identical.

The spelling of 128958012 in words is "one hundred twenty-eight million, nine hundred fifty-eight thousand, twelve".