1444421403 has 24 divisors (see below), whose sum is σ = 2176993728. Its totient is φ = 957013704.

The previous prime is 1444421399. The next prime is 1444421411. The reversal of 1444421403 is 3041244441.

1444421403 is a `hidden beast` number, since 1 + 4 + 444 + 214 + 0 + 3 = 666.

It is not a de Polignac number, because 1444421403 - 2² = 1444421399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1444421423) 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, 21376 + ... + 57842.

It is an arithmetic number, because the mean of its divisors is an integer number (90708072).

Almost surely, 2^1444421403 is an apocalyptic number.

1444421403 is a deficient number, since it is larger than the sum of its proper divisors (732572325).

1444421403 is an equidigital number, since it uses as much as digits as its factorization.

1444421403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36645 (or 36633 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 1444421403 is about 38005.5443718413. The cubic root of 1444421403 is about 1130.3978036592.

Adding to 1444421403 its reverse (3041244441), we get a palindrome (4485665844).

The spelling of 1444421403 in words is "one billion, four hundred forty-four million, four hundred twenty-one thousand, four hundred three".