128869516 has 24 divisors (see below), whose sum is σ = 228868416. Its totient is φ = 63485520.

The previous prime is 128869513. The next prime is 128869523. The reversal of 128869516 is 615968821.

It is not an unprimeable number, because it can be changed into a prime (128869513) 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, 89595 + ... + 91021.

It is an arithmetic number, because the mean of its divisors is an integer number (9536184).

Almost surely, 2^128869516 is an apocalyptic number.

It is an amenable number.

128869516 is a deficient number, since it is larger than the sum of its proper divisors (99998900).

128869516 is a wasteful number, since it uses less digits than its factorization.

128869516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1747 counting only the distinct ones).

The product of its digits is 207360, while the sum is 46.

The square root of 128869516 is about 11352.0710004827. The cubic root of 128869516 is about 505.1070138863.

The spelling of 128869516 in words is "one hundred twenty-eight million, eight hundred sixty-nine thousand, five hundred sixteen".