1905728 has 28 divisors (see below), whose sum is σ = 4126992. Its totient is φ = 865920.

The previous prime is 1905727. The next prime is 1905733. The reversal of 1905728 is 8275091.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1905694 and 1905703.

It is not an unprimeable number, because it can be changed into a prime (1905727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650 + ... + 2057.

2^1905728 is an apocalyptic number.

It is an amenable number.

1905728 is an abundant number, since it is smaller than the sum of its proper divisors (2221264).

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

1905728 is a wasteful number, since it uses less digits than its factorization.

1905728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 2720 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1905728 is about 1380.4810755675. The cubic root of 1905728 is about 123.9805727456.

The spelling of 1905728 in words is "one million, nine hundred five thousand, seven hundred twenty-eight".