30408481 has 4 divisors (see below), whose sum is σ = 30420292. Its totient is φ = 30396672.

The previous prime is 30408473. The next prime is 30408509. The reversal of 30408481 is 18480403.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18480403 = 1187 ⋅15569.

It can be written as a sum of positive squares in 2 ways, for example, as 11189025 + 19219456 = 3345^2 + 4384^2 .

It is a cyclic number.

It is not a de Polignac number, because 30408481 - 2³ = 30408473 is a prime.

It is a super-2 number, since 2×30408481² = 1849351433454722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30408401) 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 3 ways as a sum of consecutive naturals, for example, 216 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (7605073).

Almost surely, 2^30408481 is an apocalyptic number.

It is an amenable number.

30408481 is a deficient number, since it is larger than the sum of its proper divisors (11811).

30408481 is an equidigital number, since it uses as much as digits as its factorization.

30408481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11810.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 30408481 is about 5514.3885427126. The cubic root of 30408481 is about 312.1271705177.

Adding to 30408481 its reverse (18480403), we get a palindrome (48888884).

The spelling of 30408481 in words is "thirty million, four hundred eight thousand, four hundred eighty-one".