1896801809 has 24 divisors (see below), whose sum is σ = 2340264960. Its totient is φ = 1527582336.

The previous prime is 1896801791. The next prime is 1896801817. The reversal of 1896801809 is 9081086981.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1896801809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1896801859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 597344 + ... + 600510.

It is an arithmetic number, because the mean of its divisors is an integer number (97511040).

Almost surely, 2^1896801809 is an apocalyptic number.

It is an amenable number.

1896801809 is a deficient number, since it is larger than the sum of its proper divisors (443463151).

1896801809 is a wasteful number, since it uses less digits than its factorization.

1896801809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917 (or 3910 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 1896801809 is about 43552.2882177274. The cubic root of 1896801809 is about 1237.8669991867.

The spelling of 1896801809 in words is "one billion, eight hundred ninety-six million, eight hundred one thousand, eight hundred nine".