29856426990 has 32 divisors (see below), whose sum is σ = 77167381536. Its totient is φ = 7349274240.

The previous prime is 29856426989. The next prime is 29856426997. The reversal of 29856426990 is 9962465892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29856426997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38277081 + ... + 38277860.

It is an arithmetic number, because the mean of its divisors is an integer number (2411480673).

Almost surely, 2^29856426990 is an apocalyptic number.

29856426990 is an abundant number, since it is smaller than the sum of its proper divisors (47310954546).

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

29856426990 is a wasteful number, since it uses less digits than its factorization.

29856426990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76554964.

The product of its (nonzero) digits is 16796160, while the sum is 60.

The spelling of 29856426990 in words is "twenty-nine billion, eight hundred fifty-six million, four hundred twenty-six thousand, nine hundred ninety".