1728297900 has 108 divisors (see below), whose sum is σ = 6191169712. Its totient is φ = 395038080.

The previous prime is 1728297889. The next prime is 1728297917. The reversal of 1728297900 is 97928271.

1728297900 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1728297900² = 5974027262288820000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 130867 + ... + 143466.

Almost surely, 2^1728297900 is an apocalyptic number.

1728297900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1728297900 is an abundant number, since it is smaller than the sum of its proper divisors (4462871812).

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

1728297900 is a wasteful number, since it uses less digits than its factorization.

1728297900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274360 (or 274350 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 1728297900 is about 41572.8024073432. The cubic root of 1728297900 is about 1200.0689543710.

The spelling of 1728297900 in words is "one billion, seven hundred twenty-eight million, two hundred ninety-seven thousand, nine hundred".