128910386 has 16 divisors (see below), whose sum is σ = 211835520. Its totient is φ = 58348080.

The previous prime is 128910373. The next prime is 128910389. The reversal of 128910386 is 683019821.

It is not an unprimeable number, because it can be changed into a prime (128910389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7001 + ... + 17516.

It is an arithmetic number, because the mean of its divisors is an integer number (13239720).

Almost surely, 2^128910386 is an apocalyptic number.

128910386 is a deficient number, since it is larger than the sum of its proper divisors (82925134).

128910386 is a wasteful number, since it uses less digits than its factorization.

128910386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24769.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 128910386 is about 11353.8709698499. The cubic root of 128910386 is about 505.1604052089.

The spelling of 128910386 in words is "one hundred twenty-eight million, nine hundred ten thousand, three hundred eighty-six".