30306390 has 32 divisors (see below), whose sum is σ = 72887040. Its totient is φ = 8064864.

The previous prime is 30306373. The next prime is 30306403. The reversal of 30306390 is 9360303.

It is a self number, because there is not a number n which added to its sum of digits gives 30306390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21487 + ... + 22853.

It is an arithmetic number, because the mean of its divisors is an integer number (2277720).

Almost surely, 2^30306390 is an apocalyptic number.

30306390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30306390 is an abundant number, since it is smaller than the sum of its proper divisors (42580650).

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

30306390 is a wasteful number, since it uses less digits than its factorization.

30306390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116.

The product of its (nonzero) digits is 1458, while the sum is 24.

The square root of 30306390 is about 5505.1239768056. The cubic root of 30306390 is about 311.7774752865. Note that the first 3 decimals are identical.

Adding to 30306390 its reverse (9360303), we get a palindrome (39666693).

The spelling of 30306390 in words is "thirty million, three hundred six thousand, three hundred ninety".