729118420 has 12 divisors (see below), whose sum is σ = 1531148724. Its totient is φ = 291647360.

The previous prime is 729118417. The next prime is 729118441. The reversal of 729118420 is 24811927.

It can be written as a sum of positive squares in 2 ways, for example, as 111894084 + 617224336 = 10578^2 + 24844^2 .

It is a super-2 number, since 2×729118420² = 1063227340766592800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18227941 + ... + 18227980.

It is an arithmetic number, because the mean of its divisors is an integer number (127595727).

Almost surely, 2^729118420 is an apocalyptic number.

It is an amenable number.

729118420 is an abundant number, since it is smaller than the sum of its proper divisors (802030304).

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

729118420 is a wasteful number, since it uses less digits than its factorization.

729118420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36455930 (or 36455928 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 729118420 is about 27002.1928739130. The cubic root of 729118420 is about 900.0487298718.

The spelling of 729118420 in words is "seven hundred twenty-nine million, one hundred eighteen thousand, four hundred twenty".