1729396728 has 48 divisors (see below), whose sum is σ = 4798029600. Its totient is φ = 562404480.

The previous prime is 1729396693. The next prime is 1729396729. The reversal of 1729396728 is 8276939271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729396729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289968 + ... + 295871.

It is an arithmetic number, because the mean of its divisors is an integer number (99958950).

Almost surely, 2^1729396728 is an apocalyptic number.

1729396728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1729396728 is an abundant number, since it is smaller than the sum of its proper divisors (3068632872).

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

1729396728 is a wasteful number, since it uses less digits than its factorization.

1729396728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585892 (or 585885 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1729396728 is about 41586.0160150020. The cubic root of 1729396728 is about 1200.3232295944.

The spelling of 1729396728 in words is "one billion, seven hundred twenty-nine million, three hundred ninety-six thousand, seven hundred twenty-eight".