29720634328 has 64 divisors (see below), whose sum is σ = 73133510400. Its totient is φ = 10970017920.

The previous prime is 29720634323. The next prime is 29720634329. The reversal of 29720634328 is 82343602792.

It is a super-2 number, since 2×29720634328² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29720634323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1257975 + ... + 1281382.

It is an arithmetic number, because the mean of its divisors is an integer number (1142711100).

Almost surely, 2^29720634328 is an apocalyptic number.

29720634328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

29720634328 is an abundant number, since it is smaller than the sum of its proper divisors (43412876072).

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

29720634328 is a wasteful number, since it uses less digits than its factorization.

29720634328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539400 (or 2539396 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 29720634328 in words is "twenty-nine billion, seven hundred twenty million, six hundred thirty-four thousand, three hundred twenty-eight".