128301730 has 8 divisors (see below), whose sum is σ = 230943132. Its totient is φ = 51320688.

The previous prime is 128301707. The next prime is 128301731. The reversal of 128301730 is 37103821.

It can be written as a sum of positive squares in 2 ways, for example, as 125014761 + 3286969 = 11181^2 + 1813^2 .

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

It is a super-2 number, since 2×128301730² = 32922667841985800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128301695 and 128301704.

It is not an unprimeable number, because it can be changed into a prime (128301731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6415077 + ... + 6415096.

Almost surely, 2^128301730 is an apocalyptic number.

128301730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128301730 is a deficient number, since it is larger than the sum of its proper divisors (102641402).

128301730 is a wasteful number, since it uses less digits than its factorization.

128301730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12830180.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 128301730 is about 11327.0353579390. The cubic root of 128301730 is about 504.3641050198.

The spelling of 128301730 in words is "one hundred twenty-eight million, three hundred one thousand, seven hundred thirty".