12030840 has 96 divisors (see below), whose sum is σ = 40828320. Its totient is φ = 3066624.

The previous prime is 12030833. The next prime is 12030859. The reversal of 12030840 is 4803021.

It is a happy number.

It is a super-2 number, since 2×12030840² = 289482222211200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7554 + ... + 9006.

It is an arithmetic number, because the mean of its divisors is an integer number (425295).

Almost surely, 2^12030840 is an apocalyptic number.

12030840 is a gapful number since it is divisible by the number (10) 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 12030840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20414160).

12030840 is an abundant number, since it is smaller than the sum of its proper divisors (28797480).

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

12030840 is a wasteful number, since it uses less digits than its factorization.

12030840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12030840 is about 3468.5501293768. The cubic root of 12030840 is about 229.1388084410.

Adding to 12030840 its reverse (4803021), we get a palindrome (16833861).

The spelling of 12030840 in words is "twelve million, thirty thousand, eight hundred forty".