1728646607 has 4 divisors (see below), whose sum is σ = 1729249920. Its totient is φ = 1728043296.

The previous prime is 1728646589. The next prime is 1728646669. The reversal of 1728646607 is 7066468271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7066468271 = 839 ⋅8422489.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1728646607 is a prime.

It is a super-2 number, since 2×1728646607² = 5976438183785224898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728646307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297338 + ... + 303095.

It is an arithmetic number, because the mean of its divisors is an integer number (432312480).

Almost surely, 2^1728646607 is an apocalyptic number.

1728646607 is a deficient number, since it is larger than the sum of its proper divisors (603313).

1728646607 is an equidigital number, since it uses as much as digits as its factorization.

1728646607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603312.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 1728646607 is about 41576.9961276666. The cubic root of 1728646607 is about 1200.1496588807.

The spelling of 1728646607 in words is "one billion, seven hundred twenty-eight million, six hundred forty-six thousand, six hundred seven".