29857970538 has 24 divisors (see below), whose sum is σ = 70573385376. Its totient is φ = 9047869800.

The previous prime is 29857970521. The next prime is 29857970561. The reversal of 29857970538 is 83507975892.

29857970538 is a `hidden beast` number, since 2 + 9 + 8 + 5 + 7 + 97 + 0 + 538 = 666.

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, 75398718 + ... + 75399113.

It is an arithmetic number, because the mean of its divisors is an integer number (2940557724).

Almost surely, 2^29857970538 is an apocalyptic number.

29857970538 is an abundant number, since it is smaller than the sum of its proper divisors (40715414838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29857970538 is a wasteful number, since it uses less digits than its factorization.

29857970538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150797850 (or 150797847 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 63.

The spelling of 29857970538 in words is "twenty-nine billion, eight hundred fifty-seven million, nine hundred seventy thousand, five hundred thirty-eight".