30421000 has 64 divisors (see below), whose sum is σ = 73710000. Its totient is φ = 11737600.

The previous prime is 30420989. The next prime is 30421003. The reversal of 30421000 is 12403.

It can be written as a sum of positive squares in 8 ways, for example, as 5280804 + 25140196 = 2298^2 + 5014^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (30421003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28476 + ... + 29524.

Almost surely, 2^30421000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36855000).

30421000 is an abundant number, since it is smaller than the sum of its proper divisors (43289000).

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

30421000 is a wasteful number, since it uses less digits than its factorization.

30421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 30421000 is about 5515.5235472256. The cubic root of 30421000 is about 312.1699983058.

Adding to 30421000 its reverse (12403), we get a palindrome (30433403).

The spelling of 30421000 in words is "thirty million, four hundred twenty-one thousand".