730431 has 16 divisors (see below), whose sum is σ = 1165920. Its totient is φ = 449280.

The previous prime is 730421. The next prime is 730447. The reversal of 730431 is 134037.

It is not a de Polignac number, because 730431 - 2⁵ = 730399 is a prime.

It is a super-2 number, since 2×730431² = 1067058891522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 690 + ... + 1391.

It is an arithmetic number, because the mean of its divisors is an integer number (72870).

2⁷³⁰⁴³¹ is an apocalyptic number.

730431 is a deficient number, since it is larger than the sum of its proper divisors (435489).

730431 is a wasteful number, since it uses less digits than its factorization.

730431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103 (or 2097 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 730431 is about 854.6525609860. The cubic root of 730431 is about 90.0588503986.

Adding to 730431 its reverse (134037), we get a palindrome (864468).

The spelling of 730431 in words is "seven hundred thirty thousand, four hundred thirty-one".