128383730 has 8 divisors (see below), whose sum is σ = 231090732. Its totient is φ = 51353488.

The previous prime is 128383729. The next prime is 128383757. The reversal of 128383730 is 37383821.

It can be written as a sum of positive squares in 2 ways, for example, as 116014441 + 12369289 = 10771^2 + 3517^2 .

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

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, 6419177 + ... + 6419196.

Almost surely, 2^128383730 is an apocalyptic number.

128383730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128383730 is a deficient number, since it is larger than the sum of its proper divisors (102707002).

128383730 is a wasteful number, since it uses less digits than its factorization.

128383730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12838380.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 128383730 is about 11330.6544382926. The cubic root of 128383730 is about 504.4715316017.

Subtracting from 128383730 its reverse (37383821), we obtain a palindrome (90999909).

The spelling of 128383730 in words is "one hundred twenty-eight million, three hundred eighty-three thousand, seven hundred thirty".