128738223 has 6 divisors (see below), whose sum is σ = 185955224. Its totient is φ = 85825476.

The previous prime is 128738209. The next prime is 128738287. The reversal of 128738223 is 322837821.

It is a happy number.

It is not a de Polignac number, because 128738223 - 2⁵ = 128738191 is a prime.

It is a super-2 number, since 2×128738223² = 33147060122395458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128738723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7152115 + ... + 7152132.

Almost surely, 2^128738223 is an apocalyptic number.

128738223 is a deficient number, since it is larger than the sum of its proper divisors (57217001).

128738223 is a wasteful number, since it uses less digits than its factorization.

128738223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14304253 (or 14304250 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 128738223 is about 11346.2867494172. The cubic root of 128738223 is about 504.9354202946.

The spelling of 128738223 in words is "one hundred twenty-eight million, seven hundred thirty-eight thousand, two hundred twenty-three".