12440401040 has 40 divisors (see below), whose sum is σ = 28929213888. Its totient is φ = 4975251840.

The previous prime is 12440401037. The next prime is 12440401067. The reversal of 12440401040 is 4010404421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582389 + ... + 603371.

Almost surely, 2^12440401040 is an apocalyptic number.

12440401040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12440401040 is an abundant number, since it is smaller than the sum of its proper divisors (16488812848).

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

12440401040 is a wasteful number, since it uses less digits than its factorization.

12440401040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28407 (or 28401 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12440401040 its reverse (4010404421), we get a palindrome (16450805461).

The spelling of 12440401040 in words is "twelve billion, four hundred forty million, four hundred one thousand, forty".