30421140 has 48 divisors (see below), whose sum is σ = 86073792. Its totient is φ = 8027136.

The previous prime is 30421133. The next prime is 30421159. The reversal of 30421140 is 4112403.

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

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, 3207 + ... + 8433.

It is an arithmetic number, because the mean of its divisors is an integer number (1793204).

Almost surely, 2^30421140 is an apocalyptic number.

30421140 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 30421140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43036896).

30421140 is an abundant number, since it is smaller than the sum of its proper divisors (55652652).

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

30421140 is a wasteful number, since it uses less digits than its factorization.

30421140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336 (or 5334 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 30421140 is about 5515.5362386626. The cubic root of 30421140 is about 312.1704771825.

Adding to 30421140 its reverse (4112403), we get a palindrome (34533543).

The spelling of 30421140 in words is "thirty million, four hundred twenty-one thousand, one hundred forty".