405730 has 16 divisors (see below), whose sum is σ = 786744. Its totient is φ = 149760.

The previous prime is 405719. The next prime is 405731. The reversal of 405730 is 37504.

405730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 104329 + 301401 = 323^2 + 549^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405698 and 405707.

It is not an unprimeable number, because it can be changed into a prime (405731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431 + ... + 1690.

2⁴⁰⁵⁷³⁰ is an apocalyptic number.

405730 is a deficient number, since it is larger than the sum of its proper divisors (381014).

405730 is a wasteful number, since it uses less digits than its factorization.

405730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 405730 is about 636.9693870195. The cubic root of 405730 is about 74.0307882599.

The spelling of 405730 in words is "four hundred five thousand, seven hundred thirty".