29842636890 has 64 divisors (see below), whose sum is σ = 78330602880. Its totient is φ = 7216323840.

The previous prime is 29842636883. The next prime is 29842636891. The reversal of 29842636890 is 9863624892.

It is a self number, because there is not a number n which added to its sum of digits gives 29842636890.

It is not an unprimeable number, because it can be changed into a prime (29842636891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17116 + ... + 244904.

It is an arithmetic number, because the mean of its divisors is an integer number (1223915670).

Almost surely, 2^29842636890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29842636890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39165301440).

29842636890 is an abundant number, since it is smaller than the sum of its proper divisors (48487965990).

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

29842636890 is a wasteful number, since it uses less digits than its factorization.

29842636890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228207.

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 29842636890 in words is "twenty-nine billion, eight hundred forty-two million, six hundred thirty-six thousand, eight hundred ninety".