29840927920 has 80 divisors (see below), whose sum is σ = 71134339968. Its totient is φ = 11636572160.

The previous prime is 29840927899. The next prime is 29840927947. The reversal of 29840927920 is 2972904892.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950880 + ... + 981760.

Almost surely, 2^29840927920 is an apocalyptic number.

29840927920 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 29840927920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35567169984).

29840927920 is an abundant number, since it is smaller than the sum of its proper divisors (41293412048).

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

29840927920 is a wasteful number, since it uses less digits than its factorization.

29840927920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31198 (or 31192 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 29840927920 in words is "twenty-nine billion, eight hundred forty million, nine hundred twenty-seven thousand, nine hundred twenty".