128938522 has 16 divisors (see below), whose sum is σ = 208555200. Its totient is φ = 59585760.

The previous prime is 128938501. The next prime is 128938543. The reversal of 128938522 is 225839821.

It is an interprime number because it is at equal distance from previous prime (128938501) and next prime (128938543).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39822 + ... + 42937.

It is an arithmetic number, because the mean of its divisors is an integer number (13034700).

Almost surely, 2^128938522 is an apocalyptic number.

128938522 is a deficient number, since it is larger than the sum of its proper divisors (79616678).

128938522 is a wasteful number, since it uses less digits than its factorization.

128938522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82821.

The product of its digits is 69120, while the sum is 40.

The square root of 128938522 is about 11355.1099510309. The cubic root of 128938522 is about 505.1971546637.

The spelling of 128938522 in words is "one hundred twenty-eight million, nine hundred thirty-eight thousand, five hundred twenty-two".