8129849724 has 18 divisors (see below), whose sum is σ = 20550453560. Its totient is φ = 2709949896.

The previous prime is 8129849711. The next prime is 8129849729. The reversal of 8129849724 is 4279489218.

8129849724 is a `hidden beast` number, since 8 + 129 + 8 + 497 + 24 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8129849729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112914544 + ... + 112914615.

Almost surely, 2^8129849724 is an apocalyptic number.

It is an amenable number.

8129849724 is an abundant number, since it is smaller than the sum of its proper divisors (12420603836).

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

8129849724 is a wasteful number, since it uses less digits than its factorization.

8129849724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225829169 (or 225829164 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 8129849724 is about 90165.6793020493. The cubic root of 8129849724 is about 2010.7627876398.

The spelling of 8129849724 in words is "eight billion, one hundred twenty-nine million, eight hundred forty-nine thousand, seven hundred twenty-four".