29991012 has 24 divisors (see below), whose sum is σ = 72237312. Its totient is φ = 9674400.

The previous prime is 29991001. The next prime is 29991019. The reversal of 29991012 is 21019992.

It is not an unprimeable number, because it can be changed into a prime (29991019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39939 + ... + 40682.

It is an arithmetic number, because the mean of its divisors is an integer number (3009888).

Almost surely, 2^29991012 is an apocalyptic number.

It is an amenable number.

29991012 is an abundant number, since it is smaller than the sum of its proper divisors (42246300).

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

29991012 is a wasteful number, since it uses less digits than its factorization.

29991012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80659 (or 80657 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 29991012 is about 5476.4050251967. The cubic root of 29991012 is about 310.6922166006.

The spelling of 29991012 in words is "twenty-nine million, nine hundred ninety-one thousand, twelve".