128816356 has 12 divisors (see below), whose sum is σ = 225508780. Its totient is φ = 64385280.

The previous prime is 128816339. The next prime is 128816381. The reversal of 128816356 is 653618821.

It can be written as a sum of positive squares in 2 ways, for example, as 79816356 + 49000000 = 8934^2 + 7000^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16636 + ... + 23116.

Almost surely, 2^128816356 is an apocalyptic number.

It is an amenable number.

128816356 is a deficient number, since it is larger than the sum of its proper divisors (96692424).

128816356 is a wasteful number, since it uses less digits than its factorization.

128816356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11454 (or 11452 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 128816356 is about 11349.7293359798. The cubic root of 128816356 is about 505.0375503888.

The spelling of 128816356 in words is "one hundred twenty-eight million, eight hundred sixteen thousand, three hundred fifty-six".