1909149396 has 48 divisors (see below), whose sum is σ = 5553891840. Its totient is φ = 495882720.

The previous prime is 1909149383. The next prime is 1909149401. The reversal of 1909149396 is 6939419091.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1032166 + ... + 1034013.

It is an arithmetic number, because the mean of its divisors is an integer number (115706080).

Almost surely, 2^1909149396 is an apocalyptic number.

It is an amenable number.

1909149396 is an abundant number, since it is smaller than the sum of its proper divisors (3644742444).

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

1909149396 is a wasteful number, since it uses less digits than its factorization.

1909149396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066204 (or 2066202 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 51.

The square root of 1909149396 is about 43693.8141617323. The cubic root of 1909149396 is about 1240.5472341800.

The spelling of 1909149396 in words is "one billion, nine hundred nine million, one hundred forty-nine thousand, three hundred ninety-six".