1444429681 has 8 divisors (see below), whose sum is σ = 1469613600. Its totient is φ = 1419269280.

The previous prime is 1444429603. The next prime is 1444429787. The reversal of 1444429681 is 1869244441.

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

It is a cyclic number.

It is not a de Polignac number, because 1444429681 - 2²³ = 1436041073 is a prime.

It is a super-2 number, since 2×1444429681² = 4172754206707523522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444439681) 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, 156526 + ... + 165496.

It is an arithmetic number, because the mean of its divisors is an integer number (183701700).

Almost surely, 2^1444429681 is an apocalyptic number.

It is an amenable number.

1444429681 is a deficient number, since it is larger than the sum of its proper divisors (25183919).

1444429681 is an equidigital number, since it uses as much as digits as its factorization.

1444429681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11759.

The product of its digits is 221184, while the sum is 43.

The square root of 1444429681 is about 38005.6532768482. The cubic root of 1444429681 is about 1130.3999630971.

The spelling of 1444429681 in words is "one billion, four hundred forty-four million, four hundred twenty-nine thousand, six hundred eighty-one".