29708428920 has 32 divisors (see below), whose sum is σ = 89125287120. Its totient is φ = 7922247680.

The previous prime is 29708428913. The next prime is 29708428993. The reversal of 29708428920 is 2982480792.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123785001 + ... + 123785240.

Almost surely, 2^29708428920 is an apocalyptic number.

29708428920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29708428920 is an abundant number, since it is smaller than the sum of its proper divisors (59416858200).

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

29708428920 is a wasteful number, since it uses less digits than its factorization.

29708428920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247570255 (or 247570251 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 29708428920 in words is "twenty-nine billion, seven hundred eight million, four hundred twenty-eight thousand, nine hundred twenty".