1730728736 has 48 divisors (see below), whose sum is σ = 3807826848. Its totient is φ = 767500800.

The previous prime is 1730728733. The next prime is 1730728739. The reversal of 1730728736 is 6378270371.

It is an interprime number because it is at equal distance from previous prime (1730728733) and next prime (1730728739).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (1730728733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45530 + ... + 74393.

It is an arithmetic number, because the mean of its divisors is an integer number (79329726).

Almost surely, 2^1730728736 is an apocalyptic number.

1730728736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1730728736 is an abundant number, since it is smaller than the sum of its proper divisors (2077098112).

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

1730728736 is a wasteful number, since it uses less digits than its factorization.

1730728736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119985 (or 119977 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 1730728736 is about 41602.0280274892. The cubic root of 1730728736 is about 1200.6313196565.

The spelling of 1730728736 in words is "one billion, seven hundred thirty million, seven hundred twenty-eight thousand, seven hundred thirty-six".