12042023440 has 80 divisors (see below), whose sum is σ = 29664565632. Its totient is φ = 4530419712.

The previous prime is 12042023429. The next prime is 12042023467. The reversal of 12042023440 is 4432024021.

It is a happy number.

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

It is a super-3 number, since 3×12042023440³ (a number of 31 digits) contains 333 as substring.

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, 3924787 + ... + 3927853.

Almost surely, 2^12042023440 is an apocalyptic number.

12042023440 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 12042023440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14832282816).

12042023440 is an abundant number, since it is smaller than the sum of its proper divisors (17622542192).

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

12042023440 is a wasteful number, since it uses less digits than its factorization.

12042023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984 (or 5978 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 12042023440 its reverse (4432024021), we get a palindrome (16474047461).

The spelling of 12042023440 in words is "twelve billion, forty-two million, twenty-three thousand, four hundred forty".