128350730 has 8 divisors (see below), whose sum is σ = 231031332. Its totient is φ = 51340288.

The previous prime is 128350721. The next prime is 128350751. The reversal of 128350730 is 37053821.

It can be written as a sum of positive squares in 2 ways, for example, as 128346241 + 4489 = 11329^2 + 67^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128350693 and 128350702.

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, 6417527 + ... + 6417546.

Almost surely, 2^128350730 is an apocalyptic number.

128350730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128350730 is a deficient number, since it is larger than the sum of its proper divisors (102680602).

128350730 is a wasteful number, since it uses less digits than its factorization.

128350730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12835080.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 128350730 is about 11329.1981181370. The cubic root of 128350730 is about 504.4283044546.

The spelling of 128350730 in words is "one hundred twenty-eight million, three hundred fifty thousand, seven hundred thirty".