30420318 has 16 divisors (see below), whose sum is σ = 60938640. Its totient is φ = 10123776.

The previous prime is 30420317. The next prime is 30420337. The reversal of 30420318 is 81302403.

It is a happy number.

It is a super-2 number, since 2×30420318² = 1850791494442248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30420294 and 30420303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420317) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 318 + ... + 7806.

It is an arithmetic number, because the mean of its divisors is an integer number (3808665).

Almost surely, 2^30420318 is an apocalyptic number.

30420318 is an abundant number, since it is smaller than the sum of its proper divisors (30518322).

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

30420318 is a wasteful number, since it uses less digits than its factorization.

30420318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8171.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 30420318 is about 5515.4617213793. The cubic root of 30420318 is about 312.1676654707.

The spelling of 30420318 in words is "thirty million, four hundred twenty thousand, three hundred eighteen".