1728731746 has 8 divisors (see below), whose sum is σ = 2963540160. Its totient is φ = 740885028.

The previous prime is 1728731713. The next prime is 1728731783. The reversal of 1728731746 is 6471378271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1728731696 and 1728731705.

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, 61740406 + ... + 61740433.

It is an arithmetic number, because the mean of its divisors is an integer number (370442520).

Almost surely, 2^1728731746 is an apocalyptic number.

1728731746 is a deficient number, since it is larger than the sum of its proper divisors (1234808414).

1728731746 is a wasteful number, since it uses less digits than its factorization.

1728731746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123480848.

The product of its digits is 395136, while the sum is 46.

The square root of 1728731746 is about 41578.0199865265. The cubic root of 1728731746 is about 1200.1693617442.

The spelling of 1728731746 in words is "one billion, seven hundred twenty-eight million, seven hundred thirty-one thousand, seven hundred forty-six".