1905275868 has 12 divisors (see below), whose sum is σ = 4445643720. Its totient is φ = 635091952.

The previous prime is 1905275861. The next prime is 1905275893. The reversal of 1905275868 is 8685725091.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1905275868² = 7260152266366306848, 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 1905275868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1905275861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79386483 + ... + 79386506.

It is an arithmetic number, because the mean of its divisors is an integer number (370470310).

Almost surely, 2^1905275868 is an apocalyptic number.

It is an amenable number.

1905275868 is an abundant number, since it is smaller than the sum of its proper divisors (2540367852).

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

1905275868 is a wasteful number, since it uses less digits than its factorization.

1905275868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158772996 (or 158772994 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The square root of 1905275868 is about 43649.4658386560. The cubic root of 1905275868 is about 1239.7076721580.

The spelling of 1905275868 in words is "one billion, nine hundred five million, two hundred seventy-five thousand, eight hundred sixty-eight".