29871893970 has 24 divisors (see below), whose sum is σ = 77666924556. Its totient is φ = 7965838368.

The previous prime is 29871893941. The next prime is 29871893983. The reversal of 29871893970 is 7939817892.

It can be written as a sum of positive squares in 2 ways, for example, as 28273413609 + 1598480361 = 168147^2 + 39981^2 .

It is a junction number, because it is equal to n+sod(n) for n = 29871893898 and 29871893907.

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, 165954877 + ... + 165955056.

Almost surely, 2^29871893970 is an apocalyptic number.

29871893970 is an abundant number, since it is smaller than the sum of its proper divisors (47795030586).

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

29871893970 is a wasteful number, since it uses less digits than its factorization.

29871893970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331909946 (or 331909943 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 29871893970 in words is "twenty-nine billion, eight hundred seventy-one million, eight hundred ninety-three thousand, nine hundred seventy".