730388 has 24 divisors (see below), whose sum is σ = 1415232. Its totient is φ = 328064.

The previous prime is 730363. The next prime is 730397. The reversal of 730388 is 883037.

It is a self number, because there is not a number n which added to its sum of digits gives 730388.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 730388.

It is an unprimeable number.

730388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331 + ... + 1797.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁷³⁰³⁸⁸ is an apocalyptic number.

It is an amenable number.

730388 is a deficient number, since it is larger than the sum of its proper divisors (684844).

730388 is a wasteful number, since it uses less digits than its factorization.

730388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 730388 is about 854.6274041944. The cubic root of 730388 is about 90.0570831285.

The spelling of 730388 in words is "seven hundred thirty thousand, three hundred eighty-eight".