128628033 has 4 divisors (see below), whose sum is σ = 171504048. Its totient is φ = 85752020.

The previous prime is 128628023. The next prime is 128628041. The reversal of 128628033 is 330826821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128628033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128627985 and 128628003.

It is not an unprimeable number, because it can be changed into a prime (128628023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21438003 + ... + 21438008.

It is an arithmetic number, because the mean of its divisors is an integer number (42876012).

Almost surely, 2^128628033 is an apocalyptic number.

It is an amenable number.

128628033 is a deficient number, since it is larger than the sum of its proper divisors (42876015).

128628033 is an equidigital number, since it uses as much as digits as its factorization.

128628033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42876014.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 128628033 is about 11341.4299362999. The cubic root of 128628033 is about 504.7913172344.

The spelling of 128628033 in words is "one hundred twenty-eight million, six hundred twenty-eight thousand, thirty-three".