1798643 has 24 divisors (see below), whose sum is σ = 2363904. Its totient is φ = 1352400.

The previous prime is 1798639. The next prime is 1798649. The reversal of 1798643 is 3468971.

It is not a de Polignac number, because 1798643 - 2² = 1798639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1798597 and 1798606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25298 + ... + 25368.

It is an arithmetic number, because the mean of its divisors is an integer number (98496).

2^1798643 is an apocalyptic number.

1798643 is a deficient number, since it is larger than the sum of its proper divisors (565261).

1798643 is a wasteful number, since it uses less digits than its factorization.

1798643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 136 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 1798643 is about 1341.1349671081. The cubic root of 1798643 is about 121.6134635298.

The spelling of 1798643 in words is "one million, seven hundred ninety-eight thousand, six hundred forty-three".