30112380 has 72 divisors (see below), whose sum is σ = 91963872. Its totient is φ = 7975296.

The previous prime is 30112367. The next prime is 30112387. The reversal of 30112380 is 8321103.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30112387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30657 + ... + 31623.

It is an arithmetic number, because the mean of its divisors is an integer number (1277276).

Almost surely, 2^30112380 is an apocalyptic number.

30112380 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 30112380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45981936).

30112380 is an abundant number, since it is smaller than the sum of its proper divisors (61851492).

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

30112380 is a wasteful number, since it uses less digits than its factorization.

30112380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 30112380 is about 5487.4748290994. The cubic root of 30112380 is about 311.1107568968.

Adding to 30112380 its reverse (8321103), we get a palindrome (38433483).

The spelling of 30112380 in words is "thirty million, one hundred twelve thousand, three hundred eighty".