12033840 has 320 divisors, whose sum is σ = 49996800. Its totient is φ = 2322432.

The previous prime is 12033839. The next prime is 12033863. The reversal of 12033840 is 4833021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 414946 + ... + 414974.

It is an arithmetic number, because the mean of its divisors is an integer number (156240).

Almost surely, 2^12033840 is an apocalyptic number.

12033840 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 12033840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24998400).

12033840 is an abundant number, since it is smaller than the sum of its proper divisors (37962960).

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

12033840 is a wasteful number, since it uses less digits than its factorization.

12033840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 12033840 is about 3468.9825597717. The cubic root of 12033840 is about 229.1578528107.

Adding to 12033840 its reverse (4833021), we get a palindrome (16866861).

The spelling of 12033840 in words is "twelve million, thirty-three thousand, eight hundred forty".