128149386 has 16 divisors (see below), whose sum is σ = 256543200. Its totient is φ = 42675728.

The previous prime is 128149369. The next prime is 128149393. The reversal of 128149386 is 683941821.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2976 + ... + 16283.

It is an arithmetic number, because the mean of its divisors is an integer number (16033950).

Almost surely, 2^128149386 is an apocalyptic number.

128149386 is an abundant number, since it is smaller than the sum of its proper divisors (128393814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128149386 is a wasteful number, since it uses less digits than its factorization.

128149386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20373.

The product of its digits is 82944, while the sum is 42.

The square root of 128149386 is about 11320.3085646991. The cubic root of 128149386 is about 504.1644005757.

The spelling of 128149386 in words is "one hundred twenty-eight million, one hundred forty-nine thousand, three hundred eighty-six".