1401144220 has 72 divisors (see below), whose sum is σ = 3432651264. Its totient is φ = 479009664.

The previous prime is 1401144203. The next prime is 1401144229. The reversal of 1401144220 is 224411041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401144229) 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, 373474 + ... + 377206.

It is an arithmetic number, because the mean of its divisors is an integer number (47675712).

Almost surely, 2^1401144220 is an apocalyptic number.

1401144220 is a gapful number since it is divisible by the number (10) 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 1401144220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1716325632).

1401144220 is an abundant number, since it is smaller than the sum of its proper divisors (2031507044).

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

1401144220 is a wasteful number, since it uses less digits than its factorization.

1401144220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139 (or 4130 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1401144220 is about 37431.8610277395. The cubic root of 1401144220 is about 1118.9936272475.

Adding to 1401144220 its reverse (224411041), we get a palindrome (1625555261).

The spelling of 1401144220 in words is "one billion, four hundred one million, one hundred forty-four thousand, two hundred twenty".