1728900446 has 16 divisors (see below), whose sum is σ = 3191816544. Its totient is φ = 683960544.

The previous prime is 1728900389. The next prime is 1728900479. The reversal of 1728900446 is 6440098271.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4749545 + ... + 4749908.

It is an arithmetic number, because the mean of its divisors is an integer number (199488534).

Almost surely, 2^1728900446 is an apocalyptic number.

1728900446 is a deficient number, since it is larger than the sum of its proper divisors (1462916098).

1728900446 is a wasteful number, since it uses less digits than its factorization.

1728900446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9499475.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 1728900446 is about 41580.0486531702. The cubic root of 1728900446 is about 1200.2084003797.

The spelling of 1728900446 in words is "one billion, seven hundred twenty-eight million, nine hundred thousand, four hundred forty-six".