1726401728 has 14 divisors (see below), whose sum is σ = 3425828556. Its totient is φ = 863200832.

The previous prime is 1726401727. The next prime is 1726401739. The reversal of 1726401728 is 8271046271.

It is a junction number, because it is equal to n+sod(n) for n = 1726401691 and 1726401700.

It is not an unprimeable number, because it can be changed into a prime (1726401727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13487450 + ... + 13487577.

Almost surely, 2^1726401728 is an apocalyptic number.

It is an amenable number.

1726401728 is a deficient number, since it is larger than the sum of its proper divisors (1699426828).

1726401728 is an equidigital number, since it uses as much as digits as its factorization.

1726401728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26975039 (or 26975029 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 1726401728 is about 41549.9907099869. The cubic root of 1726401728 is about 1199.6299155059.

Adding to 1726401728 its reverse (8271046271), we get a palindrome (9997447999).

The spelling of 1726401728 in words is "one billion, seven hundred twenty-six million, four hundred one thousand, seven hundred twenty-eight".