128449116 has 36 divisors (see below), whose sum is σ = 326071200. Its totient is φ = 42634368.

The previous prime is 128449099. The next prime is 128449129. The reversal of 128449116 is 611944821.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1140 + ... + 16068.

Almost surely, 2^128449116 is an apocalyptic number.

It is an amenable number.

128449116 is an abundant number, since it is smaller than the sum of its proper divisors (197622084).

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

128449116 is a wasteful number, since it uses less digits than its factorization.

128449116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15178 (or 15173 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 128449116 is about 11333.5394294986. The cubic root of 128449116 is about 504.5571597346.

The spelling of 128449116 in words is "one hundred twenty-eight million, four hundred forty-nine thousand, one hundred sixteen".