730400003 has 4 divisors (see below), whose sum is σ = 755586240. Its totient is φ = 705213768.

The previous prime is 730399997. The next prime is 730400023. The reversal of 730400003 is 300004037.

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

It is a cyclic number.

It is not a de Polignac number, because 730400003 - 2⁶ = 730399939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (730400023) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12593075 + ... + 12593132.

It is an arithmetic number, because the mean of its divisors is an integer number (188896560).

Almost surely, 2^730400003 is an apocalyptic number.

730400003 is a deficient number, since it is larger than the sum of its proper divisors (25186237).

730400003 is a wasteful number, since it uses less digits than its factorization.

730400003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25186236.

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 730400003 is about 27025.9135460765. The cubic root of 730400003 is about 900.5757645046.

The spelling of 730400003 in words is "seven hundred thirty million, four hundred thousand, three".