128267412 has 96 divisors (see below), whose sum is σ = 384448512. Its totient is φ = 32351616.

The previous prime is 128267411. The next prime is 128267417. The reversal of 128267412 is 214762821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128267411) by changing a digit.

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, 22563 + ... + 27669.

It is an arithmetic number, because the mean of its divisors is an integer number (4004672).

Almost surely, 2^128267412 is an apocalyptic number.

128267412 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 128267412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192224256).

128267412 is an abundant number, since it is smaller than the sum of its proper divisors (256181100).

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

128267412 is a wasteful number, since it uses less digits than its factorization.

128267412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157 (or 5155 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 128267412 is about 11325.5203853951. The cubic root of 128267412 is about 504.3191320985.

The spelling of 128267412 in words is "one hundred twenty-eight million, two hundred sixty-seven thousand, four hundred twelve".