30210420 has 48 divisors (see below), whose sum is σ = 85135680. Its totient is φ = 8004096.

The previous prime is 30210409. The next prime is 30210457. The reversal of 30210420 is 2401203.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 30210396 and 30210405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8236 + ... + 11324.

It is an arithmetic number, because the mean of its divisors is an integer number (1773660).

Almost surely, 2^30210420 is an apocalyptic number.

30210420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30210420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42567840).

30210420 is an abundant number, since it is smaller than the sum of its proper divisors (54925260).

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

30210420 is a wasteful number, since it uses less digits than its factorization.

30210420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264 (or 3262 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 30210420 is about 5496.4006404191. The cubic root of 30210420 is about 311.4480296538.

Adding to 30210420 its reverse (2401203), we get a palindrome (32611623).

The spelling of 30210420 in words is "thirty million, two hundred ten thousand, four hundred twenty".