29857047142 has 24 divisors (see below), whose sum is σ = 49678461000. Its totient is φ = 13444067520.

The previous prime is 29857047133. The next prime is 29857047163. The reversal of 29857047142 is 24174075892.

It is a super-2 number, since 2×29857047142² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1063392 + ... + 1091107.

It is an arithmetic number, because the mean of its divisors is an integer number (2069935875).

Almost surely, 2^29857047142 is an apocalyptic number.

29857047142 is a deficient number, since it is larger than the sum of its proper divisors (19821413858).

29857047142 is a wasteful number, since it uses less digits than its factorization.

29857047142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154568 (or 2154555 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 29857047142 in words is "twenty-nine billion, eight hundred fifty-seven million, forty-seven thousand, one hundred forty-two".