1928505 has 16 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 1015488.

The previous prime is 1928501. The next prime is 1928513. The reversal of 1928505 is 5058291.

It is not a de Polignac number, because 1928505 - 2² = 1928501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1928501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471 + ... + 2019.

It is an arithmetic number, because the mean of its divisors is an integer number (195300).

2^1928505 is an apocalyptic number.

1928505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1928505 is a deficient number, since it is larger than the sum of its proper divisors (1196295).

1928505 is a wasteful number, since it uses less digits than its factorization.

1928505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 1928505 is about 1388.7062324336. The cubic root of 1928505 is about 124.4725508428.

The spelling of 1928505 in words is "one million, nine hundred twenty-eight thousand, five hundred five".