29894842856 has 16 divisors (see below), whose sum is σ = 59350055940. Its totient is φ = 14068161280.

The previous prime is 29894842847. The next prime is 29894842883. The reversal of 29894842856 is 65824849892.

It can be written as a sum of positive squares in 2 ways, for example, as 29150098756 + 744744100 = 170734^2 + 27290^2 .

It is a junction number, because it is equal to n+sod(n) for n = 29894842792 and 29894842801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109907375 + ... + 109907646.

Almost surely, 2^29894842856 is an apocalyptic number.

It is an amenable number.

29894842856 is a deficient number, since it is larger than the sum of its proper divisors (29455213084).

29894842856 is a wasteful number, since it uses less digits than its factorization.

29894842856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219815044 (or 219815040 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 65.

The spelling of 29894842856 in words is "twenty-nine billion, eight hundred ninety-four million, eight hundred forty-two thousand, eight hundred fifty-six".