944478909 has 48 divisors (see below), whose sum is σ = 1534688064. Its totient is φ = 554688000.

The previous prime is 944478883. The next prime is 944478919. The reversal of 944478909 is 909874449.

It is a happy number.

It is not a de Polignac number, because 944478909 - 2⁸ = 944478653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (944478919) 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 47 ways as a sum of consecutive naturals, for example, 1468542 + ... + 1469184.

It is an arithmetic number, because the mean of its divisors is an integer number (31972668).

Almost surely, 2^944478909 is an apocalyptic number.

944478909 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

944478909 is a deficient number, since it is larger than the sum of its proper divisors (590209155).

944478909 is a wasteful number, since it uses less digits than its factorization.

944478909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 944478909 is about 30732.3755834137. The cubic root of 944478909 is about 981.1394870658.

The spelling of 944478909 in words is "nine hundred forty-four million, four hundred seventy-eight thousand, nine hundred nine".