128643370 has 16 divisors (see below), whose sum is σ = 241626240. Its totient is φ = 49219984.

The previous prime is 128643343. The next prime is 128643379. The reversal of 128643370 is 73346821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128643379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279430 + ... + 279889.

It is an arithmetic number, because the mean of its divisors is an integer number (15101640).

Almost surely, 2^128643370 is an apocalyptic number.

128643370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128643370 is a deficient number, since it is larger than the sum of its proper divisors (112982870).

128643370 is a wasteful number, since it uses less digits than its factorization.

128643370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559349.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 128643370 is about 11342.1060654536. The cubic root of 128643370 is about 504.8113794157.

The spelling of 128643370 in words is "one hundred twenty-eight million, six hundred forty-three thousand, three hundred seventy".