30408320 has 32 divisors (see below), whose sum is σ = 72696420. Its totient is φ = 12163072.

The previous prime is 30408311. The next prime is 30408337. The reversal of 30408320 is 2380403.

It can be written as a sum of positive squares in 2 ways, for example, as 28987456 + 1420864 = 5384^2 + 1192^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30408292 and 30408301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23117 + ... + 24396.

Almost surely, 2^30408320 is an apocalyptic number.

It is an amenable number.

30408320 is an abundant number, since it is smaller than the sum of its proper divisors (42288100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30408320 is an equidigital number, since it uses as much as digits as its factorization.

30408320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47532 (or 47520 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 30408320 is about 5514.3739445199. The cubic root of 30408320 is about 312.1266196565.

Adding to 30408320 its reverse (2380403), we get a palindrome (32788723).

The spelling of 30408320 in words is "thirty million, four hundred eight thousand, three hundred twenty".