1928143 has 4 divisors (see below), whose sum is σ = 2203600. Its totient is φ = 1652688.

The previous prime is 1928141. The next prime is 1928161. The reversal of 1928143 is 3418291.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1928143 - 2¹ = 1928141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137718 + ... + 137731.

It is an arithmetic number, because the mean of its divisors is an integer number (550900).

2^1928143 is an apocalyptic number.

1928143 is a deficient number, since it is larger than the sum of its proper divisors (275457).

1928143 is an equidigital number, since it uses as much as digits as its factorization.

1928143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275456.

The product of its digits is 1728, while the sum is 28.

The square root of 1928143 is about 1388.5758891757. The cubic root of 1928143 is about 124.4647621009.

The spelling of 1928143 in words is "one million, nine hundred twenty-eight thousand, one hundred forty-three".