40001144420 has 48 divisors (see below), whose sum is σ = 84282844800. Its totient is φ = 15947124480.

The previous prime is 40001144371. The next prime is 40001144453. The reversal of 40001144420 is 2444110004.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 40001144392 and 40001144401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11333216 + ... + 11336744.

It is an arithmetic number, because the mean of its divisors is an integer number (1755892600).

Almost surely, 2^40001144420 is an apocalyptic number.

It is an amenable number.

40001144420 is an abundant number, since it is smaller than the sum of its proper divisors (44281700380).

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

40001144420 is a wasteful number, since it uses less digits than its factorization.

40001144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5268 (or 5266 counting only the distinct ones).

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

Adding to 40001144420 its reverse (2444110004), we get a palindrome (42445254424).

The spelling of 40001144420 in words is "forty billion, one million, one hundred forty-four thousand, four hundred twenty".