44240020 has 72 divisors (see below), whose sum is σ = 103698504. Its totient is φ = 15840000.

The previous prime is 44240011. The next prime is 44240023. The reversal of 44240020 is 2004244.

It can be written as a sum of positive squares in 4 ways, for example, as 3254416 + 40985604 = 1804^2 + 6402^2 .

It is a junction number, because it is equal to n+sod(n) for n = 44239976 and 44240003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44240023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244330 + ... + 244510.

It is an arithmetic number, because the mean of its divisors is an integer number (1440257).

Almost surely, 2^44240020 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 44240020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51849252).

44240020 is an abundant number, since it is smaller than the sum of its proper divisors (59458484).

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

44240020 is a wasteful number, since it uses less digits than its factorization.

44240020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 44240020 is about 6651.3171627881. The cubic root of 44240020 is about 353.6756048110.

Adding to 44240020 its reverse (2004244), we get a palindrome (46244264).

The spelling of 44240020 in words is "forty-four million, two hundred forty thousand, twenty".