1909807916 has 12 divisors (see below), whose sum is σ = 3344785920. Its totient is φ = 954154800.

The previous prime is 1909807807. The next prime is 1909807937. The reversal of 1909807916 is 6197089091.

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 3 ways as a sum of consecutive naturals, for example, 181535 + ... + 191766.

It is an arithmetic number, because the mean of its divisors is an integer number (278732160).

Almost surely, 2^1909807916 is an apocalyptic number.

It is an amenable number.

1909807916 is a deficient number, since it is larger than the sum of its proper divisors (1434978004).

1909807916 is a wasteful number, since it uses less digits than its factorization.

1909807916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374584 (or 374582 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 1909807916 is about 43701.3491324925. The cubic root of 1909807916 is about 1240.6898511411.

The spelling of 1909807916 in words is "one billion, nine hundred nine million, eight hundred seven thousand, nine hundred sixteen".