128212430 has 16 divisors (see below), whose sum is σ = 233069184. Its totient is φ = 50776800.

The previous prime is 128212411. The next prime is 128212433. The reversal of 128212430 is 34212821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128212396 and 128212405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128212433) 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, 62462 + ... + 64481.

It is an arithmetic number, because the mean of its divisors is an integer number (14566824).

Almost surely, 2^128212430 is an apocalyptic number.

128212430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128212430 is a deficient number, since it is larger than the sum of its proper divisors (104856754).

128212430 is a wasteful number, since it uses less digits than its factorization.

128212430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127051.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 128212430 is about 11323.0927753861. The cubic root of 128212430 is about 504.2470627735.

It can be divided in two parts, 12821 and 2430, that added together give a palindrome (15251).

The spelling of 128212430 in words is "one hundred twenty-eight million, two hundred twelve thousand, four hundred thirty".