30021140 has 48 divisors (see below), whose sum is σ = 66864000. Its totient is φ = 11290752.

The previous prime is 30021137. The next prime is 30021151. The reversal of 30021140 is 4112003.

It is a happy number.

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, 75422 + ... + 75818.

It is an arithmetic number, because the mean of its divisors is an integer number (1393000).

Almost surely, 2^30021140 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 30021140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33432000).

30021140 is an abundant number, since it is smaller than the sum of its proper divisors (36842860).

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

30021140 is a wasteful number, since it uses less digits than its factorization.

30021140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 30021140 is about 5479.1550443476. The cubic root of 30021140 is about 310.7962188977.

Adding to 30021140 its reverse (4112003), we get a palindrome (34133143).

The spelling of 30021140 in words is "thirty million, twenty-one thousand, one hundred forty".