1944478406 has 16 divisors (see below), whose sum is σ = 3142096944. Its totient is φ = 897161184.

The previous prime is 1944478381. The next prime is 1944478421. The reversal of 1944478406 is 6048744491.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 84281 + ... + 104843.

It is an arithmetic number, because the mean of its divisors is an integer number (196381059).

Almost surely, 2^1944478406 is an apocalyptic number.

1944478406 is a deficient number, since it is larger than the sum of its proper divisors (1197618538).

1944478406 is a wasteful number, since it uses less digits than its factorization.

1944478406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24215.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 1944478406 is about 44096.2402705718. The cubic root of 1944478406 is about 1248.1526645062.

The spelling of 1944478406 in words is "one billion, nine hundred forty-four million, four hundred seventy-eight thousand, four hundred six".