29978398893 has 32 divisors (see below), whose sum is σ = 42676215552. Its totient is φ = 18653184000.

The previous prime is 29978398871. The next prime is 29978398903. The reversal of 29978398893 is 39889387992.

It is not a de Polignac number, because 29978398893 - 2⁶ = 29978398829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29978398823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4933305 + ... + 4939377.

It is an arithmetic number, because the mean of its divisors is an integer number (1333631736).

Almost surely, 2^29978398893 is an apocalyptic number.

It is an amenable number.

29978398893 is a deficient number, since it is larger than the sum of its proper divisors (12697816659).

29978398893 is a wasteful number, since it uses less digits than its factorization.

29978398893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885.

The product of its digits is 423263232, while the sum is 75.

The spelling of 29978398893 in words is "twenty-nine billion, nine hundred seventy-eight million, three hundred ninety-eight thousand, eight hundred ninety-three".