1909038812 has 6 divisors (see below), whose sum is σ = 3340817928. Its totient is φ = 954519404.

The previous prime is 1909038811. The next prime is 1909038821. The reversal of 1909038812 is 2188309091.

It is a self number, because there is not a number n which added to its sum of digits gives 1909038812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909038811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238629848 + ... + 238629855.

It is an arithmetic number, because the mean of its divisors is an integer number (556802988).

Almost surely, 2^1909038812 is an apocalyptic number.

It is an amenable number.

1909038812 is a deficient number, since it is larger than the sum of its proper divisors (1431779116).

1909038812 is a wasteful number, since it uses less digits than its factorization.

1909038812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477259707 (or 477259705 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1909038812 is about 43692.5487011229. The cubic root of 1909038812 is about 1240.5232815715.

The spelling of 1909038812 in words is "one billion, nine hundred nine million, thirty-eight thousand, eight hundred twelve".