1909840268 has 36 divisors (see below), whose sum is σ = 3891638520. Its totient is φ = 817713792.

The previous prime is 1909840267. The next prime is 1909840279. The reversal of 1909840268 is 8620489091.

It is not an unprimeable number, because it can be changed into a prime (1909840267) 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 11 ways as a sum of consecutive naturals, for example, 228548 + ... + 236756.

It is an arithmetic number, because the mean of its divisors is an integer number (108101070).

Almost surely, 2^1909840268 is an apocalyptic number.

It is an amenable number.

1909840268 is an abundant number, since it is smaller than the sum of its proper divisors (1981798252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1909840268 is a wasteful number, since it uses less digits than its factorization.

1909840268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9414 (or 9405 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1909840268 is about 43701.7192796805. The cubic root of 1909840268 is about 1240.6968568320.

The spelling of 1909840268 in words is "one billion, nine hundred nine million, eight hundred forty thousand, two hundred sixty-eight".