128299392 has 144 divisors (see below), whose sum is σ = 400385700. Its totient is φ = 39416832.

The previous prime is 128299361. The next prime is 128299399. The reversal of 128299392 is 293992821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128299399) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 194359 + ... + 195017.

Almost surely, 2^128299392 is an apocalyptic number.

128299392 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 128299392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200192850).

128299392 is an abundant number, since it is smaller than the sum of its proper divisors (272086308).

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

128299392 is a wasteful number, since it uses less digits than its factorization.

128299392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 677 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 128299392 is about 11326.9321530589. The cubic root of 128299392 is about 504.3610413811.

The spelling of 128299392 in words is "one hundred twenty-eight million, two hundred ninety-nine thousand, three hundred ninety-two".