128709030 has 32 divisors (see below), whose sum is σ = 315477504. Its totient is φ = 33591776.

The previous prime is 128709029. The next prime is 128709067. The reversal of 128709030 is 30907821.

128709030 = 5671² + 5672² + ... + 5674².

It is a happy number.

It is a super-3 number, since 3×128709030³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44232 + ... + 47051.

It is an arithmetic number, because the mean of its divisors is an integer number (9858672).

Almost surely, 2^128709030 is an apocalyptic number.

128709030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128709030 is an abundant number, since it is smaller than the sum of its proper divisors (186768474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128709030 is a wasteful number, since it uses less digits than its factorization.

128709030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91340.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 128709030 is about 11345.0002203614. Note that the first 3 decimals coincide. The cubic root of 128709030 is about 504.8972506049.

The spelling of 128709030 in words is "one hundred twenty-eight million, seven hundred nine thousand, thirty".