29999943894 has 32 divisors (see below), whose sum is σ = 63541272960. Its totient is φ = 9409972352.

The previous prime is 29999943893. The next prime is 29999943907. The reversal of 29999943894 is 49834999992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29999943893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581017 + ... + 630539.

It is an arithmetic number, because the mean of its divisors is an integer number (1985664780).

Almost surely, 2^29999943894 is an apocalyptic number.

29999943894 is an abundant number, since it is smaller than the sum of its proper divisors (33541329066).

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

29999943894 is a wasteful number, since it uses less digits than its factorization.

29999943894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55484.

The product of its digits is 408146688, while the sum is 75.

The spelling of 29999943894 in words is "twenty-nine billion, nine hundred ninety-nine million, nine hundred forty-three thousand, eight hundred ninety-four".