1928239 has 4 divisors (see below), whose sum is σ = 1994760. Its totient is φ = 1861720.

The previous prime is 1928237. The next prime is 1928257. The reversal of 1928239 is 9328291.

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 1928239 - 2¹ = 1928237 is a prime.

It is a super-2 number, since 2×1928239² = 7436211282242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928237) 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 3 ways as a sum of consecutive naturals, for example, 33217 + ... + 33274.

It is an arithmetic number, because the mean of its divisors is an integer number (498690).

2^1928239 is an apocalyptic number.

1928239 is a deficient number, since it is larger than the sum of its proper divisors (66521).

1928239 is an equidigital number, since it uses as much as digits as its factorization.

1928239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66520.

The product of its digits is 7776, while the sum is 34.

The square root of 1928239 is about 1388.6104565356. The cubic root of 1928239 is about 124.4668277186.

It can be divided in two parts, 19282 and 39, that added together give a square (19321 = 139²).

The spelling of 1928239 in words is "one million, nine hundred twenty-eight thousand, two hundred thirty-nine".