128118924 has 36 divisors (see below), whose sum is σ = 337939056. Its totient is φ = 40849248.

The previous prime is 128118923. The next prime is 128118931. The reversal of 128118924 is 429811821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (128118923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76539 + ... + 78194.

It is an arithmetic number, because the mean of its divisors is an integer number (9387196).

Almost surely, 2^128118924 is an apocalyptic number.

It is an amenable number.

128118924 is an abundant number, since it is smaller than the sum of its proper divisors (209820132).

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

128118924 is a wasteful number, since it uses less digits than its factorization.

128118924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154766 (or 154761 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 128118924 is about 11318.9630267088. The cubic root of 128118924 is about 504.1244496156.

The spelling of 128118924 in words is "one hundred twenty-eight million, one hundred eighteen thousand, nine hundred twenty-four".