1798440 has 64 divisors (see below), whose sum is σ = 6168960. Its totient is φ = 410880.

The previous prime is 1798429. The next prime is 1798441. The reversal of 1798440 is 448971.

It is not an unprimeable number, because it can be changed into a prime (1798441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231 + ... + 1910.

It is an arithmetic number, because the mean of its divisors is an integer number (96390).

2^1798440 is an apocalyptic number.

1798440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1798440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3084480).

1798440 is an abundant number, since it is smaller than the sum of its proper divisors (4370520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1798440 is a wasteful number, since it uses less digits than its factorization.

1798440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162 (or 2158 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1798440 is about 1341.0592828059. The cubic root of 1798440 is about 121.6088881430.

The spelling of 1798440 in words is "one million, seven hundred ninety-eight thousand, four hundred forty".