44720820 has 72 divisors (see below), whose sum is σ = 137985120. Its totient is φ = 11720640.

The previous prime is 44720807. The next prime is 44720899. The reversal of 44720820 is 2802744.

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, 8515 + ... + 12725.

It is an arithmetic number, because the mean of its divisors is an integer number (1916460).

Almost surely, 2^44720820 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 44720820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68992560).

44720820 is an abundant number, since it is smaller than the sum of its proper divisors (93264300).

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

44720820 is a wasteful number, since it uses less digits than its factorization.

44720820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285 (or 4280 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 44720820 is about 6687.3627088711. The cubic root of 44720820 is about 354.9522384994.

The spelling of 44720820 in words is "forty-four million, seven hundred twenty thousand, eight hundred twenty".