29978252857 has 8 divisors (see below), whose sum is σ = 34368941376. Its totient is φ = 25614584592.

The previous prime is 29978252851. The next prime is 29978252861. The reversal of 29978252857 is 75825287992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29978252857 - 2⁷ = 29978252729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29978252851) 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 7 ways as a sum of consecutive naturals, for example, 6752683 + ... + 6757120.

It is an arithmetic number, because the mean of its divisors is an integer number (4296117672).

Almost surely, 2^29978252857 is an apocalyptic number.

It is an amenable number.

29978252857 is a deficient number, since it is larger than the sum of its proper divisors (4390688519).

29978252857 is a wasteful number, since it uses less digits than its factorization.

29978252857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13510127.

The product of its digits is 50803200, while the sum is 64.

The spelling of 29978252857 in words is "twenty-nine billion, nine hundred seventy-eight million, two hundred fifty-two thousand, eight hundred fifty-seven".