100044021440 has 56 divisors (see below), whose sum is σ = 259887092112. Its totient is φ = 36379642880.

The previous prime is 100044021439. The next prime is 100044021443. The reversal of 100044021440 is 44120440001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (100044021443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14207279 + ... + 14214318.

Almost surely, 2^100044021440 is an apocalyptic number.

100044021440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100044021440 is an abundant number, since it is smaller than the sum of its proper divisors (159843070672).

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

100044021440 is a wasteful number, since it uses less digits than its factorization.

100044021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28421625 (or 28421615 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 100044021440 its reverse (44120440001), we get a palindrome (144164461441).

The spelling of 100044021440 in words is "one hundred billion, forty-four million, twenty-one thousand, four hundred forty".