128834433 has 24 divisors (see below), whose sum is σ = 229040448. Its totient is φ = 67956192.

The previous prime is 128834417. The next prime is 128834441. The reversal of 128834433 is 334438821.

It is a happy number.

128834433 is a `hidden beast` number, since 1 + 288 + 344 + 33 = 666.

It is not a de Polignac number, because 128834433 - 2⁴ = 128834417 is a prime.

It is a super-2 number, since 2×128834433² = 33196622252862978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128834413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77835 + ... + 79472.

It is an arithmetic number, because the mean of its divisors is an integer number (9543352).

Almost surely, 2^128834433 is an apocalyptic number.

128834433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

128834433 is a deficient number, since it is larger than the sum of its proper divisors (100206015).

128834433 is a wasteful number, since it uses less digits than its factorization.

128834433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157333 (or 157330 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 128834433 is about 11350.5256706463. The cubic root of 128834433 is about 505.0611735194.

It can be divided in two parts, 1288 and 34433, that added together give a square (35721 = 189²).

The spelling of 128834433 in words is "one hundred twenty-eight million, eight hundred thirty-four thousand, four hundred thirty-three".