44643720 has 128 divisors (see below), whose sum is σ = 150958080. Its totient is φ = 10464000.

The previous prime is 44643691. The next prime is 44643721. The reversal of 44643720 is 2734644.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (44643721) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 40375 + ... + 41465.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^44643720 is an apocalyptic number.

44643720 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 44643720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75479040).

44643720 is an abundant number, since it is smaller than the sum of its proper divisors (106314360).

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

44643720 is a wasteful number, since it uses less digits than its factorization.

44643720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 44643720 is about 6681.5956178147. The cubic root of 44643720 is about 354.7481384872.

The spelling of 44643720 in words is "forty-four million, six hundred forty-three thousand, seven hundred twenty".