1905500 has 48 divisors (see below), whose sum is σ = 4315584. Its totient is φ = 734400.

The previous prime is 1905499. The next prime is 1905517. The reversal of 1905500 is 55091.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18449 + ... + 18551.

It is an arithmetic number, because the mean of its divisors is an integer number (89908).

2^1905500 is an apocalyptic number.

1905500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1905500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2157792).

1905500 is an abundant number, since it is smaller than the sum of its proper divisors (2410084).

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

1905500 is a wasteful number, since it uses less digits than its factorization.

1905500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 1905500 is about 1380.3984931896. The cubic root of 1905500 is about 123.9756282313.

The spelling of 1905500 in words is "one million, nine hundred five thousand, five hundred".