128872116 has 36 divisors (see below), whose sum is σ = 326829412. Its totient is φ = 42816384.

The previous prime is 128872109. The next prime is 128872123. The reversal of 128872116 is 611278821.

It is an interprime number because it is at equal distance from previous prime (128872109) and next prime (128872123).

It can be written as a sum of positive squares in 2 ways, for example, as 13395600 + 115476516 = 3660^2 + 10746^2 .

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5550 + ... + 16986.

Almost surely, 2^128872116 is an apocalyptic number.

It is an amenable number.

128872116 is an abundant number, since it is smaller than the sum of its proper divisors (197957296).

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

128872116 is a wasteful number, since it uses less digits than its factorization.

128872116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11760 (or 11755 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 128872116 is about 11352.1855164545. The cubic root of 128872116 is about 505.1104107832.

The spelling of 128872116 in words is "one hundred twenty-eight million, eight hundred seventy-two thousand, one hundred sixteen".