128918356 has 24 divisors (see below), whose sum is σ = 258077120. Its totient is φ = 55199232.

The previous prime is 128918353. The next prime is 128918357. The reversal of 128918356 is 653819821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128918351) 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, 58075 + ... + 60253.

Almost surely, 2^128918356 is an apocalyptic number.

It is an amenable number.

128918356 is an abundant number, since it is smaller than the sum of its proper divisors (129158764).

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

128918356 is a wasteful number, since it uses less digits than its factorization.

128918356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303 (or 4301 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 128918356 is about 11354.2219460428. The cubic root of 128918356 is about 505.1708156591.

The spelling of 128918356 in words is "one hundred twenty-eight million, nine hundred eighteen thousand, three hundred fifty-six".