1720330 has 16 divisors (see below), whose sum is σ = 3141504. Its totient is φ = 678160.

The previous prime is 1720321. The next prime is 1720339. The reversal of 1720330 is 330271.

It is an interprime number because it is at equal distance from previous prime (1720321) and next prime (1720339).

It is not an unprimeable number, because it can be changed into a prime (1720339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (196344).

2^1720330 is an apocalyptic number.

1720330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1720330 is a deficient number, since it is larger than the sum of its proper divisors (1421174).

1720330 is a wasteful number, since it uses less digits than its factorization.

1720330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 1720330 is about 1311.6135101469. The cubic root of 1720330 is about 119.8221903649.

The spelling of 1720330 in words is "one million, seven hundred twenty thousand, three hundred thirty".