1720284 has 12 divisors (see below), whose sum is σ = 4014024. Its totient is φ = 573424.

The previous prime is 1720273. The next prime is 1720289. The reversal of 1720284 is 4820271.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71667 + ... + 71690.

It is an arithmetic number, because the mean of its divisors is an integer number (334502).

2^1720284 is an apocalyptic number.

It is an amenable number.

1720284 is an abundant number, since it is smaller than the sum of its proper divisors (2293740).

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

1720284 is a wasteful number, since it uses less digits than its factorization.

1720284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143364 (or 143362 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 1720284 is about 1311.5959743763. The cubic root of 1720284 is about 119.8211223780.

It can be divided in two parts, 17 and 20284, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 1720284 in words is "one million, seven hundred twenty thousand, two hundred eighty-four".