729620 has 18 divisors (see below), whose sum is σ = 1540266. Its totient is φ = 290320.

The previous prime is 729613. The next prime is 729637. The reversal of 729620 is 26927.

It can be written as a sum of positive squares in only one way, i.e., 583696 + 145924 = 764^2 + 382^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 729620.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3725 + ... + 3915.

2⁷²⁹⁶²⁰ is an apocalyptic number.

It is an amenable number.

729620 is an abundant number, since it is smaller than the sum of its proper divisors (810646).

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

729620 is a wasteful number, since it uses less digits than its factorization.

729620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 729620 is about 854.1779674049. The cubic root of 729620 is about 90.0255071735.

The spelling of 729620 in words is "seven hundred twenty-nine thousand, six hundred twenty".