64705944 has 96 divisors (see below), whose sum is σ = 181252800. Its totient is φ = 19192320.

The previous prime is 64705943. The next prime is 64705957. The reversal of 64705944 is 44950746.

It is a happy number.

It is a super-2 number, since 2×64705944² = 8373718377862272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64705943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131539 + ... + 132029.

It is an arithmetic number, because the mean of its divisors is an integer number (1888050).

Almost surely, 2^64705944 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 64705944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90626400).

64705944 is an abundant number, since it is smaller than the sum of its proper divisors (116546856).

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

64705944 is a wasteful number, since it uses less digits than its factorization.

64705944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 64705944 is about 8044.0004972650. Note that the first 3 decimals coincide. The cubic root of 64705944 is about 401.4653420434.

The spelling of 64705944 in words is "sixty-four million, seven hundred five thousand, nine hundred forty-four".