1720896 has 28 divisors (see below), whose sum is σ = 4553712. Its totient is φ = 573568.

The previous prime is 1720867. The next prime is 1720897. The reversal of 1720896 is 6980271.

It is a super-2 number, since 2×1720896² = 5922966085632, which contains 22 as substring.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (1720897) 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, 4290 + ... + 4673.

2^1720896 is an apocalyptic number.

1720896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1720896 is an abundant number, since it is smaller than the sum of its proper divisors (2832816).

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

1720896 is an equidigital number, since it uses as much as digits as its factorization.

1720896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8978 (or 8968 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1720896 is about 1311.8292571825. The cubic root of 1720896 is about 119.8353296897.

The spelling of 1720896 in words is "one million, seven hundred twenty thousand, eight hundred ninety-six".