128128016 has 20 divisors (see below), whose sum is σ = 253531392. Its totient is φ = 62700576.

The previous prime is 128127973. The next prime is 128128027. The reversal of 128128016 is 610821821.

It is a self number, because there is not a number n which added to its sum of digits gives 128128016.

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, 84440 + ... + 85943.

Almost surely, 2^128128016 is an apocalyptic number.

128128016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128128016 is a deficient number, since it is larger than the sum of its proper divisors (125403376).

128128016 is a wasteful number, since it uses less digits than its factorization.

128128016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170438 (or 170432 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 128128016 is about 11319.3646464808. The cubic root of 128128016 is about 504.1363744506.

Adding to 128128016 its reverse (610821821), we get a palindrome (738949837).

The spelling of 128128016 in words is "one hundred twenty-eight million, one hundred twenty-eight thousand, sixteen".