128438552 has 32 divisors (see below), whose sum is σ = 263476800. Its totient is φ = 58212000.

The previous prime is 128438551. The next prime is 128438561. The reversal of 128438552 is 255834821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128438551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31427 + ... + 35277.

It is an arithmetic number, because the mean of its divisors is an integer number (8233650).

Almost surely, 2^128438552 is an apocalyptic number.

It is an amenable number.

128438552 is an abundant number, since it is smaller than the sum of its proper divisors (135038248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128438552 is a wasteful number, since it uses less digits than its factorization.

128438552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4247 (or 4243 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The square root of 128438552 is about 11333.0733695675. The cubic root of 128438552 is about 504.5433273105.

The spelling of 128438552 in words is "one hundred twenty-eight million, four hundred thirty-eight thousand, five hundred fifty-two".