29133720840 has 128 divisors (see below), whose sum is σ = 100120043520. Its totient is φ = 6643603200.

The previous prime is 29133720817. The next prime is 29133720871. The reversal of 29133720840 is 4802733192.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321805 + ... + 402275.

It is an arithmetic number, because the mean of its divisors is an integer number (782187840).

Almost surely, 2^29133720840 is an apocalyptic number.

29133720840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29133720840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50060021760).

29133720840 is an abundant number, since it is smaller than the sum of its proper divisors (70986322680).

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

29133720840 is a wasteful number, since it uses less digits than its factorization.

29133720840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80923 (or 80919 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 29133720840 in words is "twenty-nine billion, one hundred thirty-three million, seven hundred twenty thousand, eight hundred forty".