12000032240 has 80 divisors (see below), whose sum is σ = 32408610240. Its totient is φ = 4046837760.

The previous prime is 12000032227. The next prime is 12000032249. The reversal of 12000032240 is 4223000021.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×12000032240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000032249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141485 + ... + 209804.

It is an arithmetic number, because the mean of its divisors is an integer number (405107628).

Almost surely, 2^12000032240 is an apocalyptic number.

12000032240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12000032240 is an abundant number, since it is smaller than the sum of its proper divisors (20408578000).

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

12000032240 is a wasteful number, since it uses less digits than its factorization.

12000032240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351370 (or 351364 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 12000032240 its reverse (4223000021), we get a palindrome (16223032261).

The spelling of 12000032240 in words is "twelve billion, thirty-two thousand, two hundred forty".