290730 has 32 divisors (see below), whose sum is σ = 762048. Its totient is φ = 70400.

The previous prime is 290711. The next prime is 290737. The reversal of 290730 is 37092.

It is a junction number, because it is equal to n+sod(n) for n = 290697 and 290706.

It is not an unprimeable number, because it can be changed into a prime (290737) by changing a digit.

290730 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111 + ... + 770.

It is an arithmetic number, because the mean of its divisors is an integer number (23814).

2²⁹⁰⁷³⁰ is an apocalyptic number.

290730 is an abundant number, since it is smaller than the sum of its proper divisors (471318).

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

290730 is a wasteful number, since it uses less digits than its factorization.

290730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 290730 is about 539.1938426948. The cubic root of 290730 is about 66.2465525677.

The spelling of 290730 in words is "two hundred ninety thousand, seven hundred thirty".