128434630 has 16 divisors (see below), whose sum is σ = 233473104. Its totient is φ = 50864800.

The previous prime is 128434619. The next prime is 128434633. The reversal of 128434630 is 36434821.

It is a junction number, because it is equal to n+sod(n) for n = 128434592 and 128434601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128434633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62572 + ... + 64591.

It is an arithmetic number, because the mean of its divisors is an integer number (14592069).

Almost surely, 2^128434630 is an apocalyptic number.

128434630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128434630 is a deficient number, since it is larger than the sum of its proper divisors (105038474).

128434630 is a wasteful number, since it uses less digits than its factorization.

128434630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127271.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 128434630 is about 11332.9003348657. The cubic root of 128434630 is about 504.5381916794.

The spelling of 128434630 in words is "one hundred twenty-eight million, four hundred thirty-four thousand, six hundred thirty".