29939973426 has 48 divisors (see below), whose sum is σ = 71191044288. Its totient is φ = 9018381600.

The previous prime is 29939973391. The next prime is 29939973439. The reversal of 29939973426 is 62437993992.

29939973426 is a `hidden beast` number, since 2 + 99 + 39 + 97 + 3 + 426 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 419665 + ... + 485796.

It is an arithmetic number, because the mean of its divisors is an integer number (1483146756).

Almost surely, 2^29939973426 is an apocalyptic number.

29939973426 is an abundant number, since it is smaller than the sum of its proper divisors (41251070862).

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

29939973426 is a wasteful number, since it uses less digits than its factorization.

29939973426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905647 (or 905644 counting only the distinct ones).

The product of its digits is 39680928, while the sum is 63.

The spelling of 29939973426 in words is "twenty-nine billion, nine hundred thirty-nine million, nine hundred seventy-three thousand, four hundred twenty-six".