1908945 has 24 divisors (see below), whose sum is σ = 3369600. Its totient is φ = 999456.

The previous prime is 1908943. The next prime is 1908967. The reversal of 1908945 is 5498091.

1908945 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 1908945 - 2¹ = 1908943 is a prime.

1908945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1908943) 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, 2296 + ... + 3014.

It is an arithmetic number, because the mean of its divisors is an integer number (140400).

2^1908945 is an apocalyptic number.

1908945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1908945 is a deficient number, since it is larger than the sum of its proper divisors (1460655).

1908945 is a wasteful number, since it uses less digits than its factorization.

1908945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1908945 is about 1381.6457577831. The cubic root of 1908945 is about 124.0502961070.

The spelling of 1908945 in words is "one million, nine hundred eight thousand, nine hundred forty-five".