1908891853 has 16 divisors (see below), whose sum is σ = 2159913600. Its totient is φ = 1671100480.

The previous prime is 1908891839. The next prime is 1908891857. The reversal of 1908891853 is 3581988091.

It is a cyclic number.

It is not a de Polignac number, because 1908891853 - 2²⁵ = 1875337421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1908891853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1908891857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116400 + ... + 131782.

It is an arithmetic number, because the mean of its divisors is an integer number (134994600).

Almost surely, 2^1908891853 is an apocalyptic number.

It is an amenable number.

1908891853 is a deficient number, since it is larger than the sum of its proper divisors (251021747).

1908891853 is a wasteful number, since it uses less digits than its factorization.

1908891853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15812.

The product of its (nonzero) digits is 622080, while the sum is 52.

The square root of 1908891853 is about 43690.8669289132. The cubic root of 1908891853 is about 1240.4914486690.

The spelling of 1908891853 in words is "one billion, nine hundred eight million, eight hundred ninety-one thousand, eight hundred fifty-three".