1728120 has 32 divisors (see below), whose sum is σ = 5184720. Its totient is φ = 460800.

The previous prime is 1728119. The next prime is 1728121. The reversal of 1728120 is 218271.

It is an interprime number because it is at equal distance from previous prime (1728119) and next prime (1728121).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728121) 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, 7081 + ... + 7320.

2^1728120 is an apocalyptic number.

1728120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1728120 is an abundant number, since it is smaller than the sum of its proper divisors (3456600).

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

1728120 is a wasteful number, since it uses less digits than its factorization.

1728120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14415 (or 14411 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1728120 is about 1314.5797807665. The cubic root of 1728120 is about 120.0027777135.

The spelling of 1728120 in words is "one million, seven hundred twenty-eight thousand, one hundred twenty".