1909121848 has 16 divisors (see below), whose sum is σ = 3594970080. Its totient is φ = 950463168.

The previous prime is 1909121833. The next prime is 1909121849. The reversal of 1909121848 is 8481219091.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909121849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510240 + ... + 513967.

It is an arithmetic number, because the mean of its divisors is an integer number (224685630).

Almost surely, 2^1909121848 is an apocalyptic number.

It is an amenable number.

1909121848 is a deficient number, since it is larger than the sum of its proper divisors (1685848232).

1909121848 is a wasteful number, since it uses less digits than its factorization.

1909121848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024446 (or 1024442 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 1909121848 is about 43693.4989214643. The cubic root of 1909121848 is about 1240.5412673413.

The spelling of 1909121848 in words is "one billion, nine hundred nine million, one hundred twenty-one thousand, eight hundred forty-eight".