29399171720 has 32 divisors (see below), whose sum is σ = 66229773120. Its totient is φ = 11745155520.

The previous prime is 29399171719. The next prime is 29399171741. The reversal of 29399171720 is 2717199392.

It is a super-2 number, since 2×29399171720² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420692 + ... + 485571.

It is an arithmetic number, because the mean of its divisors is an integer number (2069680410).

Almost surely, 2^29399171720 is an apocalyptic number.

29399171720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29399171720 is an abundant number, since it is smaller than the sum of its proper divisors (36830601400).

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

29399171720 is a wasteful number, since it uses less digits than its factorization.

29399171720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907085 (or 907081 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 50.

The spelling of 29399171720 in words is "twenty-nine billion, three hundred ninety-nine million, one hundred seventy-one thousand, seven hundred twenty".