1400220144 has 120 divisors (see below), whose sum is σ = 4013260992. Its totient is φ = 455569920.

The previous prime is 1400220109. The next prime is 1400220149. The reversal of 1400220144 is 4410220041.

1400220144 is a `hidden beast` number, since 1 + 400 + 220 + 1 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400220149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2067934 + ... + 2068610.

Almost surely, 2^1400220144 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 1400220144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2006630496).

1400220144 is an abundant number, since it is smaller than the sum of its proper divisors (2613040848).

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

1400220144 is a wasteful number, since it uses less digits than its factorization.

1400220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1400220144 is about 37419.5155500442. The cubic root of 1400220144 is about 1118.7475753555.

Adding to 1400220144 its reverse (4410220041), we get a palindrome (5810440185).

The spelling of 1400220144 in words is "one billion, four hundred million, two hundred twenty thousand, one hundred forty-four".