1909686348 has 24 divisors (see below), whose sum is σ = 4951038960. Its totient is φ = 636562080.

The previous prime is 1909686329. The next prime is 1909686349. The reversal of 1909686348 is 8436869091.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1909686294 and 1909686303.

It is not an unprimeable number, because it can be changed into a prime (1909686349) by changing a digit.

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, 8841033 + ... + 8841248.

It is an arithmetic number, because the mean of its divisors is an integer number (206293290).

Almost surely, 2^1909686348 is an apocalyptic number.

1909686348 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1909686348 is an abundant number, since it is smaller than the sum of its proper divisors (3041352612).

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

1909686348 is a wasteful number, since it uses less digits than its factorization.

1909686348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17682294 (or 17682286 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The square root of 1909686348 is about 43699.9582150830. The cubic root of 1909686348 is about 1240.6635253899.

The spelling of 1909686348 in words is "one billion, nine hundred nine million, six hundred eighty-six thousand, three hundred forty-eight".