1928939 has 4 divisors (see below), whose sum is σ = 2042424. Its totient is φ = 1815456.

The previous prime is 1928929. The next prime is 1928947. The reversal of 1928939 is 9398291.

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 1928939 - 2¹⁶ = 1863403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1928896 and 1928905.

It is not an unprimeable number, because it can be changed into a prime (1928929) 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, 56717 + ... + 56750.

It is an arithmetic number, because the mean of its divisors is an integer number (510606).

2^1928939 is an apocalyptic number.

1928939 is a deficient number, since it is larger than the sum of its proper divisors (113485).

1928939 is a wasteful number, since it uses less digits than its factorization.

1928939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113484.

The product of its digits is 34992, while the sum is 41.

The square root of 1928939 is about 1388.8624841934. The cubic root of 1928939 is about 124.4818874421.

The spelling of 1928939 in words is "one million, nine hundred twenty-eight thousand, nine hundred thirty-nine".