128726830 has 8 divisors (see below), whose sum is σ = 231708312. Its totient is φ = 51490728.

The previous prime is 128726797. The next prime is 128726833. The reversal of 128726830 is 38627821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 128726830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128726833) 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, 6436332 + ... + 6436351.

It is an arithmetic number, because the mean of its divisors is an integer number (28963539).

Almost surely, 2^128726830 is an apocalyptic number.

128726830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128726830 is a deficient number, since it is larger than the sum of its proper divisors (102981482).

128726830 is a wasteful number, since it uses less digits than its factorization.

128726830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12872690.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 128726830 is about 11345.7846797831. The cubic root of 128726830 is about 504.9205246953.

Subtracting from 128726830 its reverse (38627821), we obtain a palindrome (90099009).

The spelling of 128726830 in words is "one hundred twenty-eight million, seven hundred twenty-six thousand, eight hundred thirty".