1908485865 has 48 divisors (see below), whose sum is σ = 3886384320. Its totient is φ = 854144640.

The previous prime is 1908485861. The next prime is 1908485897. The reversal of 1908485865 is 5685848091.

It is a happy number.

1908485865 is a `hidden beast` number, since 19 + 0 + 8 + 48 + 586 + 5 = 666.

1908485865 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1908485865 - 2² = 1908485861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1908485861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141855 + ... + 154724.

It is an arithmetic number, because the mean of its divisors is an integer number (80966340).

Almost surely, 2^1908485865 is an apocalyptic number.

1908485865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1908485865 is an abundant number, since it is smaller than the sum of its proper divisors (1977898455).

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

1908485865 is a wasteful number, since it uses less digits than its factorization.

1908485865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296614 (or 296611 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The square root of 1908485865 is about 43686.2205392043. The cubic root of 1908485865 is about 1240.4034988025.

The spelling of 1908485865 in words is "one billion, nine hundred eight million, four hundred eighty-five thousand, eight hundred sixty-five".