820729294 has 48 divisors (see below), whose sum is σ = 1562345856. Its totient is φ = 314139600.

The previous prime is 820729289. The next prime is 820729303. The reversal of 820729294 is 492927028.

It is a self number, because there is not a number n which added to its sum of digits gives 820729294.

It is a congruent number.

It is an unprimeable number.

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, 535309 + ... + 536839.

It is an arithmetic number, because the mean of its divisors is an integer number (32548872).

Almost surely, 2^820729294 is an apocalyptic number.

820729294 is a deficient number, since it is larger than the sum of its proper divisors (741616562).

820729294 is a wasteful number, since it uses less digits than its factorization.

820729294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 820729294 is about 28648.3733220579. The cubic root of 820729294 is about 936.2675646481.

The spelling of 820729294 in words is "eight hundred twenty million, seven hundred twenty-nine thousand, two hundred ninety-four".