729490 has 8 divisors (see below), whose sum is σ = 1313100. Its totient is φ = 291792.

The previous prime is 729473. The next prime is 729493. The reversal of 729490 is 94927.

It can be written as a sum of positive squares in 2 ways, for example, as 667489 + 62001 = 817^2 + 249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (729493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36465 + ... + 36484.

2⁷²⁹⁴⁹⁰ is an apocalyptic number.

729490 is a deficient number, since it is larger than the sum of its proper divisors (583610).

729490 is a wasteful number, since it uses less digits than its factorization.

729490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72956.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 729490 is about 854.1018674608. The cubic root of 729490 is about 90.0201600928.

The spelling of 729490 in words is "seven hundred twenty-nine thousand, four hundred ninety".