128385792 has 108 divisors (see below), whose sum is σ = 374452624. Its totient is φ = 42301440.

The previous prime is 128385779. The next prime is 128385797. The reversal of 128385792 is 297583821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128385797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237042 + ... + 237582.

Almost surely, 2^128385792 is an apocalyptic number.

128385792 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 128385792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187226312).

128385792 is an abundant number, since it is smaller than the sum of its proper divisors (246066832).

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

128385792 is a wasteful number, since it uses less digits than its factorization.

128385792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 649 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 128385792 is about 11330.7454300236. The cubic root of 128385792 is about 504.4742323975.

The spelling of 128385792 in words is "one hundred twenty-eight million, three hundred eighty-five thousand, seven hundred ninety-two".