729091764 has 36 divisors (see below), whose sum is σ = 1873200420. Its totient is φ = 239045760.

The previous prime is 729091751. The next prime is 729091787. The reversal of 729091764 is 467190927.

It can be written as a sum of positive squares in 2 ways, for example, as 37822500 + 691269264 = 6150^2 + 26292^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163809 + ... + 168200.

It is an arithmetic number, because the mean of its divisors is an integer number (52033345).

Almost surely, 2^729091764 is an apocalyptic number.

It is an amenable number.

729091764 is an abundant number, since it is smaller than the sum of its proper divisors (1144108656).

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

729091764 is a wasteful number, since it uses less digits than its factorization.

729091764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332080 (or 332075 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 729091764 is about 27001.6992798601. The cubic root of 729091764 is about 900.0377613786.

The spelling of 729091764 in words is "seven hundred twenty-nine million, ninety-one thousand, seven hundred sixty-four".