64128044 has 12 divisors (see below), whose sum is σ = 114126600. Its totient is φ = 31520448.

The previous prime is 64128017. The next prime is 64128047. The reversal of 64128044 is 44082146.

It is a super-2 number, since 2×64128044² = 8224812054531872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64127998 and 64128016.

It is not an unprimeable number, because it can be changed into a prime (64128047) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 135629 + ... + 136100.

It is an arithmetic number, because the mean of its divisors is an integer number (9510550).

Almost surely, 2^64128044 is an apocalyptic number.

It is an amenable number.

64128044 is a deficient number, since it is larger than the sum of its proper divisors (49998556).

64128044 is a wasteful number, since it uses less digits than its factorization.

64128044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271792 (or 271790 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 64128044 is about 8007.9987512487. The cubic root of 64128044 is about 400.2665806308.

The spelling of 64128044 in words is "sixty-four million, one hundred twenty-eight thousand, forty-four".