12231840 has 96 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 3067904.

The previous prime is 12231833. The next prime is 12231853. The reversal of 12231840 is 4813221.

It is a tau number, because it is divible by the number of its divisors (96).

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, 7411 + ... + 8909.

It is an arithmetic number, because the mean of its divisors is an integer number (425250).

Almost surely, 2^12231840 is an apocalyptic number.

12231840 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 12231840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20412000).

12231840 is an abundant number, since it is smaller than the sum of its proper divisors (28592160).

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

12231840 is a wasteful number, since it uses less digits than its factorization.

12231840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 12231840 is about 3497.4047520983. The cubic root of 12231840 is about 230.4078459905.

The spelling of 12231840 in words is "twelve million, two hundred thirty-one thousand, eight hundred forty".