29857142887 has 36 divisors (see below), whose sum is σ = 37301408760. Its totient is φ = 23735812320.

The previous prime is 29857142867. The next prime is 29857142921. The reversal of 29857142887 is 78824175892.

It is a de Polignac number, because none of the positive numbers 2^k-29857142887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29857142867) 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 35 ways as a sum of consecutive naturals, for example, 541564 + ... + 594142.

Almost surely, 2^29857142887 is an apocalyptic number.

29857142887 is a deficient number, since it is larger than the sum of its proper divisors (7444265873).

29857142887 is a wasteful number, since it uses less digits than its factorization.

29857142887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52652 (or 52622 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 61.

The spelling of 29857142887 in words is "twenty-nine billion, eight hundred fifty-seven million, one hundred forty-two thousand, eight hundred eighty-seven".