30380240 has 160 divisors (see below), whose sum is σ = 85708800. Its totient is φ = 9884160.

The previous prime is 30380237. The next prime is 30380243. The reversal of 30380240 is 4208303.

It is an interprime number because it is at equal distance from previous prime (30380237) and next prime (30380243).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30380243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384521 + ... + 384599.

It is an arithmetic number, because the mean of its divisors is an integer number (535680).

Almost surely, 2^30380240 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 30380240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42854400).

30380240 is an abundant number, since it is smaller than the sum of its proper divisors (55328560).

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

30380240 is a wasteful number, since it uses less digits than its factorization.

30380240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 30380240 is about 5511.8272832156. The cubic root of 30380240 is about 312.0305142191.

Adding to 30380240 its reverse (4208303), we get a palindrome (34588543).

The spelling of 30380240 in words is "thirty million, three hundred eighty thousand, two hundred forty".