1839406 has 4 divisors (see below), whose sum is σ = 2759112. Its totient is φ = 919702.

The previous prime is 1839401. The next prime is 1839413. The reversal of 1839406 is 6049381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6049381 = 13 ⋅465337.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1839401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459850 + ... + 459853.

It is an arithmetic number, because the mean of its divisors is an integer number (689778).

2^1839406 is an apocalyptic number.

1839406 is a deficient number, since it is larger than the sum of its proper divisors (919706).

1839406 is an equidigital number, since it uses as much as digits as its factorization.

1839406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919705.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1839406 is about 1356.2470276465. The cubic root of 1839406 is about 122.5253258758.

The spelling of 1839406 in words is "one million, eight hundred thirty-nine thousand, four hundred six".