1444428135 has 24 divisors (see below), whose sum is σ = 2506031424. Its totient is φ = 769636800.

The previous prime is 1444428121. The next prime is 1444428173. The reversal of 1444428135 is 5318244441.

It is not a de Polignac number, because 1444428135 - 2⁴ = 1444428119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1444428135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35085 + ... + 64185.

It is an arithmetic number, because the mean of its divisors is an integer number (104417976).

Almost surely, 2^1444428135 is an apocalyptic number.

1444428135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1444428135 is a deficient number, since it is larger than the sum of its proper divisors (1061603289).

1444428135 is a wasteful number, since it uses less digits than its factorization.

1444428135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30215 (or 30212 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 1444428135 is about 38005.6329377633. The cubic root of 1444428135 is about 1130.3995598009.

The spelling of 1444428135 in words is "one billion, four hundred forty-four million, four hundred twenty-eight thousand, one hundred thirty-five".