29978961812 has 12 divisors (see below), whose sum is σ = 52465236096. Its totient is φ = 14988894360.

The previous prime is 29978961809. The next prime is 29978961827. The reversal of 29978961812 is 21816987992.

It is a congruent number.

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, 19364 + ... + 245627.

It is an arithmetic number, because the mean of its divisors is an integer number (4372103008).

Almost surely, 2^29978961812 is an apocalyptic number.

It is an amenable number.

29978961812 is a deficient number, since it is larger than the sum of its proper divisors (22486274284).

29978961812 is a wasteful number, since it uses less digits than its factorization.

29978961812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293278 (or 293276 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 62.

The spelling of 29978961812 in words is "twenty-nine billion, nine hundred seventy-eight million, nine hundred sixty-one thousand, eight hundred twelve".