1802240 has 64 divisors (see below), whose sum is σ = 4718520. Its totient is φ = 655360.

The previous prime is 1802239. The next prime is 1802261. The reversal of 1802240 is 422081.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163835 + ... + 163845.

2^1802240 is an apocalyptic number.

1802240 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 1802240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359260).

1802240 is an abundant number, since it is smaller than the sum of its proper divisors (2916280).

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

1802240 is an frugal number, since it uses more digits than its factorization.

1802240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1802240 is about 1342.4753256578. The cubic root of 1802240 is about 121.6944787444.

The spelling of 1802240 in words is "one million, eight hundred two thousand, two hundred forty".