29389728838 has 16 divisors (see below), whose sum is σ = 45312132096. Its totient is φ = 14288750280.

The previous prime is 29389728821. The next prime is 29389728857. The reversal of 29389728838 is 83882798392.

It is a super-2 number, since 2×29389728838² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 747058 + ... + 785413.

It is an arithmetic number, because the mean of its divisors is an integer number (2832008256).

Almost surely, 2^29389728838 is an apocalyptic number.

29389728838 is a deficient number, since it is larger than the sum of its proper divisors (15922403258).

29389728838 is a wasteful number, since it uses less digits than its factorization.

29389728838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532739.

The product of its digits is 83607552, while the sum is 67.

The spelling of 29389728838 in words is "twenty-nine billion, three hundred eighty-nine million, seven hundred twenty-eight thousand, eight hundred thirty-eight".