7229129136 has 40 divisors (see below), whose sum is σ = 18860166384. Its totient is φ = 2385849600.

The previous prime is 7229129123. The next prime is 7229129161. The reversal of 7229129136 is 6319219227.

It is a super-3 number, since 3×7229129136³ (a number of 31 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 740731 + ... + 750426.

Almost surely, 2^7229129136 is an apocalyptic number.

It is an amenable number.

7229129136 is an abundant number, since it is smaller than the sum of its proper divisors (11631037248).

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

7229129136 is a wasteful number, since it uses less digits than its factorization.

7229129136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491269 (or 1491263 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 7229129136 is about 85024.2855659487. The cubic root of 7229129136 is about 1933.5793275044.

Subtracting from 7229129136 its reverse (6319219227), we obtain a palindrome (909909909).

The spelling of 7229129136 in words is "seven billion, two hundred twenty-nine million, one hundred twenty-nine thousand, one hundred thirty-six".