1919472385 has 8 divisors (see below), whose sum is σ = 2318826600. Its totient is φ = 1525271424.

The previous prime is 1919472361. The next prime is 1919472413. The reversal of 1919472385 is 5832749191.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 944784 + 1918527601 = 972^2 + 43801^2 .

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 1919472385 - 2²¹ = 1917375233 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287492 + ... + 1288981.

It is an arithmetic number, because the mean of its divisors is an integer number (289853325).

Almost surely, 2^1919472385 is an apocalyptic number.

It is an amenable number.

1919472385 is a deficient number, since it is larger than the sum of its proper divisors (399354215).

1919472385 is a wasteful number, since it uses less digits than its factorization.

1919472385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576627.

The product of its digits is 544320, while the sum is 49.

The square root of 1919472385 is about 43811.7836318039. The cubic root of 1919472385 is about 1242.7791431682.

The spelling of 1919472385 in words is "one billion, nine hundred nineteen million, four hundred seventy-two thousand, three hundred eighty-five".