64238944 has 144 divisors (see below), whose sum is σ = 168569856. Its totient is φ = 23385600.

The previous prime is 64238927. The next prime is 64238953. The reversal of 64238944 is 44983246.

It is a junction number, because it is equal to n+sod(n) for n = 64238897 and 64238906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2072209 + ... + 2072239.

It is an arithmetic number, because the mean of its divisors is an integer number (1170624).

Almost surely, 2^64238944 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 64238944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84284928).

64238944 is an abundant number, since it is smaller than the sum of its proper divisors (104330912).

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

64238944 is a wasteful number, since it uses less digits than its factorization.

64238944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 80 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 64238944 is about 8014.9200869379. The cubic root of 64238944 is about 400.4971817697.

The spelling of 64238944 in words is "sixty-four million, two hundred thirty-eight thousand, nine hundred forty-four".