44420100 has 72 divisors (see below), whose sum is σ = 135303840. Its totient is φ = 11220480.

The previous prime is 44420071. The next prime is 44420111. The reversal of 44420100 is 102444.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 44420100.

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, 1804 + ... + 9596.

It is an arithmetic number, because the mean of its divisors is an integer number (1879220).

Almost surely, 2^44420100 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 44420100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67651920).

44420100 is an abundant number, since it is smaller than the sum of its proper divisors (90883740).

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

44420100 is a wasteful number, since it uses less digits than its factorization.

44420100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829 (or 7822 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 44420100 is about 6664.8405832398. The cubic root of 44420100 is about 354.1548366675.

Adding to 44420100 its reverse (102444), we get a palindrome (44522544).

The spelling of 44420100 in words is "forty-four million, four hundred twenty thousand, one hundred".