29811492172 has 48 divisors (see below), whose sum is σ = 65419345152. Its totient is φ = 11547708480.

The previous prime is 29811492127. The next prime is 29811492197. The reversal of 29811492172 is 27129411892.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226458 + ... + 333025.

It is an arithmetic number, because the mean of its divisors is an integer number (1362903024).

Almost surely, 2^29811492172 is an apocalyptic number.

29811492172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

29811492172 is an abundant number, since it is smaller than the sum of its proper divisors (35607852980).

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

29811492172 is a wasteful number, since it uses less digits than its factorization.

29811492172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559678 (or 559676 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

It can be divided in two parts, 298114 and 92172, that added together give a triangular number (390286 = T₈₈₃).

The spelling of 29811492172 in words is "twenty-nine billion, eight hundred eleven million, four hundred ninety-two thousand, one hundred seventy-two".