128833920 has 96 divisors (see below), whose sum is σ = 444899520. Its totient is φ = 34354176.

The previous prime is 128833907. The next prime is 128833933. The reversal of 128833920 is 29338821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128833907) and next prime (128833933).

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5424 + ... + 16943.

It is an arithmetic number, because the mean of its divisors is an integer number (4634370).

Almost surely, 2^128833920 is an apocalyptic number.

128833920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128833920 is an abundant number, since it is smaller than the sum of its proper divisors (316065600).

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

128833920 is a wasteful number, since it uses less digits than its factorization.

128833920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22392 (or 22377 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 128833920 is about 11350.5030725515. The cubic root of 128833920 is about 505.0605031584.

The spelling of 128833920 in words is "one hundred twenty-eight million, eight hundred thirty-three thousand, nine hundred twenty".