128633057 has 4 divisors (see below), whose sum is σ = 147009216. Its totient is φ = 110256900.

The previous prime is 128633051. The next prime is 128633069. The reversal of 128633057 is 750336821.

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, and also an emirpimes, since its reverse is a distinct semiprime: 750336821 = 13 ⋅57718217.

It is a cyclic number.

It is not a de Polignac number, because 128633057 - 2¹² = 128628961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128633051) 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, 9188069 + ... + 9188082.

It is an arithmetic number, because the mean of its divisors is an integer number (36752304).

Almost surely, 2^128633057 is an apocalyptic number.

It is an amenable number.

128633057 is a deficient number, since it is larger than the sum of its proper divisors (18376159).

128633057 is an equidigital number, since it uses as much as digits as its factorization.

128633057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18376158.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 128633057 is about 11341.6514229631. The cubic root of 128633057 is about 504.7978892558.

Adding to 128633057 its reverse (750336821), we get a palindrome (878969878).

It can be divided in two parts, 1286 and 33057, that added together give a palindrome (34343).

The spelling of 128633057 in words is "one hundred twenty-eight million, six hundred thirty-three thousand, fifty-seven".