1944800064 has 112 divisors (see below), whose sum is σ = 5739831040. Its totient is φ = 645719040.

The previous prime is 1944800063. The next prime is 1944800069. The reversal of 1944800064 is 4600084491.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944800063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466212 + ... + 470364.

Almost surely, 2^1944800064 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 1944800064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2869915520).

1944800064 is an abundant number, since it is smaller than the sum of its proper divisors (3795030976).

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

1944800064 is a wasteful number, since it uses less digits than its factorization.

1944800064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445 (or 4429 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1944800064 is about 44099.8873467949. The cubic root of 1944800064 is about 1248.2214843592.

The spelling of 1944800064 in words is "one billion, nine hundred forty-four million, eight hundred thousand, sixty-four".