128395564 has 24 divisors (see below), whose sum is σ = 249278400. Its totient is φ = 57371280.

The previous prime is 128395537. The next prime is 128395567. The reversal of 128395564 is 465593821.

It is a self number, because there is not a number n which added to its sum of digits gives 128395564.

It is not an unprimeable number, because it can be changed into a prime (128395567) 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, 22134 + ... + 27325.

It is an arithmetic number, because the mean of its divisors is an integer number (10386600).

Almost surely, 2^128395564 is an apocalyptic number.

It is an amenable number.

128395564 is a deficient number, since it is larger than the sum of its proper divisors (120882836).

128395564 is a wasteful number, since it uses less digits than its factorization.

128395564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49533 (or 49531 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The square root of 128395564 is about 11331.1766379313. The cubic root of 128395564 is about 504.4870313141.

The spelling of 128395564 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, five hundred sixty-four".