128354436 has 144 divisors (see below), whose sum is σ = 393671040. Its totient is φ = 35424000.

The previous prime is 128354423. The next prime is 128354453. The reversal of 128354436 is 634453821.

128354436 is a `hidden beast` number, since 1 + 2 + 83 + 544 + 36 = 666.

It is a super-2 number, since 2×128354436² = 32949722481756192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 128354436.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1270786 + ... + 1270886.

Almost surely, 2^128354436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128354436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196835520).

128354436 is an abundant number, since it is smaller than the sum of its proper divisors (265316604).

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

128354436 is a wasteful number, since it uses less digits than its factorization.

128354436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 154 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 128354436 is about 11329.3616766347. The cubic root of 128354436 is about 504.4331593635.

It can be divided in two parts, 12835 and 4436, that added together give a palindrome (17271).

The spelling of 128354436 in words is "one hundred twenty-eight million, three hundred fifty-four thousand, four hundred thirty-six".