1909455136 has 24 divisors (see below), whose sum is σ = 3764985840. Its totient is φ = 953268288.

The previous prime is 1909455131. The next prime is 1909455139. The reversal of 1909455136 is 6315549091.

It is a junction number, because it is equal to n+sod(n) for n = 1909455092 and 1909455101.

It is not an unprimeable number, because it can be changed into a prime (1909455131) 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 3 ways as a sum of consecutive naturals, for example, 24186 + ... + 66361.

It is an arithmetic number, because the mean of its divisors is an integer number (156874410).

Almost surely, 2^1909455136 is an apocalyptic number.

1909455136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1909455136 is a deficient number, since it is larger than the sum of its proper divisors (1855530704).

1909455136 is an equidigital number, since it uses as much as digits as its factorization.

1909455136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91216 (or 91208 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 1909455136 is about 43697.3126862511. The cubic root of 1909455136 is about 1240.6134529661.

The spelling of 1909455136 in words is "one billion, nine hundred nine million, four hundred fifty-five thousand, one hundred thirty-six".