1000729730 has 128 divisors (see below), whose sum is σ = 2434199040. Its totient is φ = 286064640.

The previous prime is 1000729711. The next prime is 1000729733. The reversal of 1000729730 is 379270001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1000729693 and 1000729702.

It is not an unprimeable number, because it can be changed into a prime (1000729733) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2572376 + ... + 2572764.

It is an arithmetic number, because the mean of its divisors is an integer number (19017180).

Almost surely, 2^1000729730 is an apocalyptic number.

1000729730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000729730 is an abundant number, since it is smaller than the sum of its proper divisors (1433469310).

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

1000729730 is a wasteful number, since it uses less digits than its factorization.

1000729730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 1000729730 is about 31634.3125419219. The cubic root of 1000729730 is about 1000.2431841900.

Adding to 1000729730 its reverse (379270001), we get a palindrome (1379999731).

The spelling of 1000729730 in words is "one billion, seven hundred twenty-nine thousand, seven hundred thirty".