44000640 has 96 divisors (see below), whose sum is σ = 151959600. Its totient is φ = 11731968.

The previous prime is 44000639. The next prime is 44000651. The reversal of 44000640 is 4600044.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1941 + ... + 9579.

Almost surely, 2^44000640 is an apocalyptic number.

44000640 is a gapful number since it is divisible by the number (40) 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 44000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75979800).

44000640 is an abundant number, since it is smaller than the sum of its proper divisors (107958960).

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

44000640 is a wasteful number, since it uses less digits than its factorization.

44000640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7664 (or 7649 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 44000640 is about 6633.2978223505. The cubic root of 44000640 is about 353.0365452083.

Adding to 44000640 its reverse (4600044), we get a palindrome (48600684).

The spelling of 44000640 in words is "forty-four million, six hundred forty", and thus it is an aban number.