29857142888 has 8 divisors (see below), whose sum is σ = 55982142930. Its totient is φ = 14928571440.

The previous prime is 29857142867. The next prime is 29857142921. The reversal of 29857142888 is 88824175892.

It can be written as a sum of positive squares in only one way, i.e., 27923078404 + 1934064484 = 167102^2 + 43978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 29857142888.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1866071423 + ... + 1866071438.

Almost surely, 2^29857142888 is an apocalyptic number.

It is an amenable number.

29857142888 is a deficient number, since it is larger than the sum of its proper divisors (26125000042).

29857142888 is a wasteful number, since it uses less digits than its factorization.

29857142888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732142867 (or 3732142863 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 62.

The spelling of 29857142888 in words is "twenty-nine billion, eight hundred fifty-seven million, one hundred forty-two thousand, eight hundred eighty-eight".