1908144069 has 16 divisors (see below), whose sum is σ = 2770689600. Its totient is φ = 1161046656.

The previous prime is 1908144061. The next prime is 1908144149. The reversal of 1908144069 is 9604418091.

It is not a de Polignac number, because 1908144069 - 2³ = 1908144061 is a prime.

It is a super-2 number, since 2×1908144069² = 7282027576119753522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1908144069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1908144061) 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, 271399 + ... + 278340.

It is an arithmetic number, because the mean of its divisors is an integer number (173168100).

Almost surely, 2^1908144069 is an apocalyptic number.

It is an amenable number.

1908144069 is a deficient number, since it is larger than the sum of its proper divisors (862545531).

1908144069 is a wasteful number, since it uses less digits than its factorization.

1908144069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549844.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1908144069 is about 43682.3084211446. The cubic root of 1908144069 is about 1240.3294452864.

The spelling of 1908144069 in words is "one billion, nine hundred eight million, one hundred forty-four thousand, sixty-nine".