128994833 has 12 divisors (see below), whose sum is σ = 147955584. Its totient is φ = 112167000.

The previous prime is 128994829. The next prime is 128994841. The reversal of 128994833 is 338499821.

It is a happy number.

It is not a de Polignac number, because 128994833 - 2² = 128994829 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128994823) 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, 20393 + ... + 25958.

It is an arithmetic number, because the mean of its divisors is an integer number (12329632).

Almost surely, 2^128994833 is an apocalyptic number.

It is an amenable number.

128994833 is a deficient number, since it is larger than the sum of its proper divisors (18960751).

128994833 is a wasteful number, since it uses less digits than its factorization.

128994833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46396 (or 46385 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 128994833 is about 11357.5892248311. The cubic root of 128994833 is about 505.2706884589.

The spelling of 128994833 in words is "one hundred twenty-eight million, nine hundred ninety-four thousand, eight hundred thirty-three".