1802720 has 48 divisors (see below), whose sum is σ = 4490640. Its totient is φ = 681984.

The previous prime is 1802719. The next prime is 1802737. The reversal of 1802720 is 272081.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1802692 and 1802701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2744 + ... + 3336.

It is an arithmetic number, because the mean of its divisors is an integer number (93555).

2^1802720 is an apocalyptic number.

1802720 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 1802720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2245320).

1802720 is an abundant number, since it is smaller than the sum of its proper divisors (2687920).

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

1802720 is a wasteful number, since it uses less digits than its factorization.

1802720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1802720 is about 1342.6540879914. The cubic root of 1802720 is about 121.7052816276.

The spelling of 1802720 in words is "one million, eight hundred two thousand, seven hundred twenty".