729171420 has 48 divisors (see below), whose sum is σ = 2070448128. Its totient is φ = 191705920.

The previous prime is 729171413. The next prime is 729171427. The reversal of 729171420 is 24171927.

It is an interprime number because it is at equal distance from previous prime (729171413) and next prime (729171427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729171427) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 81324 + ... + 89843.

It is an arithmetic number, because the mean of its divisors is an integer number (43134336).

Almost surely, 2^729171420 is an apocalyptic number.

It is an amenable number.

729171420 is an abundant number, since it is smaller than the sum of its proper divisors (1341276708).

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

729171420 is a wasteful number, since it uses less digits than its factorization.

729171420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171250 (or 171248 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 729171420 is about 27003.1742578535. The cubic root of 729171420 is about 900.0705376813.

The spelling of 729171420 in words is "seven hundred twenty-nine million, one hundred seventy-one thousand, four hundred twenty".