64722944 has 144 divisors (see below), whose sum is σ = 161867160. Its totient is φ = 25559040.

The previous prime is 64722929. The next prime is 64722997. The reversal of 64722944 is 44922746.

It is a junction number, because it is equal to n+sod(n) for n = 64722898 and 64722907.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 3807224 + ... + 3807240.

Almost surely, 2^64722944 is an apocalyptic number.

64722944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64722944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80933580).

64722944 is an abundant number, since it is smaller than the sum of its proper divisors (97144216).

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

64722944 is a wasteful number, since it uses less digits than its factorization.

64722944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 43 counting only the distinct ones).

The product of its digits is 96768, while the sum is 38.

The square root of 64722944 is about 8045.0571160185. The cubic root of 64722944 is about 401.5004975627.

The spelling of 64722944 in words is "sixty-four million, seven hundred twenty-two thousand, nine hundred forty-four".