128016890 has 8 divisors (see below), whose sum is σ = 230430420. Its totient is φ = 51206752.

The previous prime is 128016869. The next prime is 128016901. The reversal of 128016890 is 98610821.

It can be written as a sum of positive squares in 2 ways, for example, as 127757809 + 259081 = 11303^2 + 509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 128016890.

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, 6400835 + ... + 6400854.

Almost surely, 2^128016890 is an apocalyptic number.

128016890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128016890 is a deficient number, since it is larger than the sum of its proper divisors (102413530).

128016890 is a wasteful number, since it uses less digits than its factorization.

128016890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12801696.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 128016890 is about 11314.4549139585. The cubic root of 128016890 is about 503.9905857190.

It can be divided in two parts, 12801 and 6890, that added together give a palindrome (19691).

The spelling of 128016890 in words is "one hundred twenty-eight million, sixteen thousand, eight hundred ninety".