44020840 has 64 divisors (see below), whose sum is σ = 103582800. Its totient is φ = 16816128.

The previous prime is 44020817. The next prime is 44020841. The reversal of 44020840 is 4802044.

It can be written as a sum of positive squares in 8 ways, for example, as 13704804 + 30316036 = 3702^2 + 5506^2 .

It is not an unprimeable number, because it can be changed into a prime (44020841) 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, 158782 + ... + 159058.

Almost surely, 2^44020840 is an apocalyptic number.

44020840 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 44020840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51791400).

44020840 is an abundant number, since it is smaller than the sum of its proper divisors (59561960).

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

44020840 is a wasteful number, since it uses less digits than its factorization.

44020840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 44020840 is about 6634.8202688543. The cubic root of 44020840 is about 353.0905614469.

Adding to 44020840 its reverse (4802044), we get a palindrome (48822884).

Subtracting from 44020840 its reverse (4802044), we obtain a triangular number (39218796 = T₈₈₅₆).

The spelling of 44020840 in words is "forty-four million, twenty thousand, eight hundred forty".