30321420 has 24 divisors (see below), whose sum is σ = 84900144. Its totient is φ = 8085696.

The previous prime is 30321413. The next prime is 30321433. The reversal of 30321420 is 2412303.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30321420.

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 7 ways as a sum of consecutive naturals, for example, 252619 + ... + 252738.

It is an arithmetic number, because the mean of its divisors is an integer number (3537506).

Almost surely, 2^30321420 is an apocalyptic number.

30321420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30321420 is an abundant number, since it is smaller than the sum of its proper divisors (54578724).

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

30321420 is a wasteful number, since it uses less digits than its factorization.

30321420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505369 (or 505367 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 30321420 is about 5506.4888994712. The cubic root of 30321420 is about 311.8290072243.

Adding to 30321420 its reverse (2412303), we get a palindrome (32733723).

The spelling of 30321420 in words is "thirty million, three hundred twenty-one thousand, four hundred twenty".