29999621376 has 324 divisors, whose sum is σ = 91784763252. Its totient is φ = 9782083584.

The previous prime is 29999621369. The next prime is 29999621389. The reversal of 29999621376 is 67312699992.

It can be written as a sum of positive squares in 2 ways, for example, as 14841086976 + 15158534400 = 121824^2 + 123120^2 .

It is a tau number, because it is divible by the number of its divisors (324).

It is a super-2 number, since 2×29999621376² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 89019480 + ... + 89019816.

Almost surely, 2^29999621376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29999621376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45892381626).

29999621376 is an abundant number, since it is smaller than the sum of its proper divisors (61785141876).

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

29999621376 is an frugal number, since it uses more digits than its factorization.

29999621376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 395 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The spelling of 29999621376 in words is "twenty-nine billion, nine hundred ninety-nine million, six hundred twenty-one thousand, three hundred seventy-six".