29289738920 has 32 divisors (see below), whose sum is σ = 70971291720. Its totient is φ = 10814672640.

The previous prime is 29289738911. The next prime is 29289738941. The reversal of 29289738920 is 2983798292.

It can be written as a sum of positive squares in 4 ways, for example, as 26076436324 + 3213302596 = 161482^2 + 56686^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 29289738920.

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, 28162691 + ... + 28163730.

Almost surely, 2^29289738920 is an apocalyptic number.

29289738920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29289738920 is an abundant number, since it is smaller than the sum of its proper divisors (41681552800).

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

29289738920 is a wasteful number, since it uses less digits than its factorization.

29289738920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56326445 (or 56326441 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 29289738920 in words is "twenty-nine billion, two hundred eighty-nine million, seven hundred thirty-eight thousand, nine hundred twenty".