128346644 has 12 divisors (see below), whose sum is σ = 224686644. Its totient is φ = 64150464.

The previous prime is 128346641. The next prime is 128346649. The reversal of 128346644 is 446643821.

It can be written as a sum of positive squares in 2 ways, for example, as 66912400 + 61434244 = 8180^2 + 7838^2 .

It is a super-2 number, since 2×128346644² = 32945722052125472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128346598 and 128346607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128346641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16592 + ... + 23064.

It is an arithmetic number, because the mean of its divisors is an integer number (18723887).

Almost surely, 2^128346644 is an apocalyptic number.

It is an amenable number.

128346644 is a deficient number, since it is larger than the sum of its proper divisors (96340000).

128346644 is a wasteful number, since it uses less digits than its factorization.

128346644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11434 (or 11432 counting only the distinct ones).

The product of its digits is 110592, while the sum is 38.

The square root of 128346644 is about 11329.0177861984. The cubic root of 128346644 is about 504.4229516324.

The spelling of 128346644 in words is "one hundred twenty-eight million, three hundred forty-six thousand, six hundred forty-four".