29720868 has 12 divisors (see below), whose sum is σ = 69348720. Its totient is φ = 9906952.

The previous prime is 29720861. The next prime is 29720891. The reversal of 29720868 is 86802792.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (29720861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238358 + ... + 1238381.

It is an arithmetic number, because the mean of its divisors is an integer number (5779060).

Almost surely, 2^29720868 is an apocalyptic number.

It is an amenable number.

29720868 is an abundant number, since it is smaller than the sum of its proper divisors (39627852).

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

29720868 is a wasteful number, since it uses less digits than its factorization.

29720868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476746 (or 2476744 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 29720868 is about 5451.6848771733. The cubic root of 29720868 is about 309.7565483682.

The spelling of 29720868 in words is "twenty-nine million, seven hundred twenty thousand, eight hundred sixty-eight".