1020729798 has 48 divisors (see below), whose sum is σ = 2427512256. Its totient is φ = 307404720.

The previous prime is 1020729797. The next prime is 1020729803. The reversal of 1020729798 is 8979270201.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020729797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16461 + ... + 48087.

It is an arithmetic number, because the mean of its divisors is an integer number (50573172).

Almost surely, 2^1020729798 is an apocalyptic number.

1020729798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020729798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213756128).

1020729798 is an abundant number, since it is smaller than the sum of its proper divisors (1406782458).

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

1020729798 is a wasteful number, since it uses less digits than its factorization.

1020729798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31809 (or 31806 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 1020729798 is about 31948.8622332627. The cubic root of 1020729798 is about 1006.8627278945.

Adding to 1020729798 its reverse (8979270201), we get a palindrome (9999999999).

The spelling of 1020729798 in words is "one billion, twenty million, seven hundred twenty-nine thousand, seven hundred ninety-eight".