730426 has 4 divisors (see below), whose sum is σ = 1095642. Its totient is φ = 365212.

The previous prime is 730421. The next prime is 730447. The reversal of 730426 is 624037.

730426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 429025 + 301401 = 655^2 + 549^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 730397 and 730406.

It is not an unprimeable number, because it can be changed into a prime (730421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182605 + ... + 182608.

2⁷³⁰⁴²⁶ is an apocalyptic number.

730426 is a deficient number, since it is larger than the sum of its proper divisors (365216).

730426 is a wasteful number, since it uses less digits than its factorization.

730426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365215.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 730426 is about 854.6496358158. The cubic root of 730426 is about 90.0586449057.

It can be divided in two parts, 730 and 426, that added together give a square (1156 = 34²).

The spelling of 730426 in words is "seven hundred thirty thousand, four hundred twenty-six".