1720960 has 32 divisors (see below), whose sum is σ = 4115700. Its totient is φ = 688128.

The previous prime is 1720951. The next prime is 1720973. The reversal of 1720960 is 690271.

It can be written as a sum of positive squares in 2 ways, for example, as 1498176 + 222784 = 1224^2 + 472^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705 + ... + 1984.

2^1720960 is an apocalyptic number.

1720960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1720960 is an abundant number, since it is smaller than the sum of its proper divisors (2394740).

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

1720960 is an equidigital number, since it uses as much as digits as its factorization.

1720960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708 (or 2696 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1720960 is about 1311.8536503742. The cubic root of 1720960 is about 119.8368152270.

The spelling of 1720960 in words is "one million, seven hundred twenty thousand, nine hundred sixty".