64068444 has 144 divisors (see below), whose sum is σ = 193729536. Its totient is φ = 17625600.

The previous prime is 64068443. The next prime is 64068451. The reversal of 64068444 is 44486046.

64068444 is a `hidden beast` number, since 640 + 6 + 8 + 4 + 4 + 4 = 666.

It is a super-2 number, since 2×64068444² = 8209531033162272, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 64068399 and 64068408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64068443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 208539 + ... + 208845.

It is an arithmetic number, because the mean of its divisors is an integer number (1345344).

Almost surely, 2^64068444 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 64068444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96864768).

64068444 is an abundant number, since it is smaller than the sum of its proper divisors (129661092).

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

64068444 is a wasteful number, since it uses less digits than its factorization.

64068444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 64068444 is about 8004.2766069146. The cubic root of 64068444 is about 400.1425408659.

The spelling of 64068444 in words is "sixty-four million, sixty-eight thousand, four hundred forty-four".