1444400421 has 8 divisors (see below), whose sum is σ = 1926709824. Its totient is φ = 962512320.

The previous prime is 1444400407. The next prime is 1444400443. The reversal of 1444400421 is 1240044441.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1444400421 - 2¹⁵ = 1444367653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1444400391 and 1444400400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444400821) 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, 97236 + ... + 111101.

It is an arithmetic number, because the mean of its divisors is an integer number (240838728).

Almost surely, 2^1444400421 is an apocalyptic number.

It is an amenable number.

1444400421 is a deficient number, since it is larger than the sum of its proper divisors (482309403).

1444400421 is a wasteful number, since it uses less digits than its factorization.

1444400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210651.

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 1444400421 is about 38005.2683321668. The cubic root of 1444400421 is about 1130.3923301592.

Adding to 1444400421 its reverse (1240044441), we get a palindrome (2684444862).

The spelling of 1444400421 in words is "one billion, four hundred forty-four million, four hundred thousand, four hundred twenty-one".