30403405 has 16 divisors (see below), whose sum is σ = 38191104. Its totient is φ = 23207040.

The previous prime is 30403369. The next prime is 30403409. The reversal of 30403405 is 50430403.

It is a de Polignac number, because none of the positive numbers 2^k-30403405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30403409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9972 + ... + 12658.

It is an arithmetic number, because the mean of its divisors is an integer number (2386944).

Almost surely, 2^30403405 is an apocalyptic number.

It is an amenable number.

30403405 is a deficient number, since it is larger than the sum of its proper divisors (7787699).

30403405 is a wasteful number, since it uses less digits than its factorization.

30403405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 30403405 is about 5513.9282730192. The cubic root of 30403405 is about 312.1098020553.

Adding to 30403405 its reverse (50430403), we get a palindrome (80833808).

The spelling of 30403405 in words is "thirty million, four hundred three thousand, four hundred five".