40440340312 has 8 divisors (see below), whose sum is σ = 75825638100. Its totient is φ = 20220170152.

The previous prime is 40440340279. The next prime is 40440340313. The reversal of 40440340312 is 21304304404.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×40440340312² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440340313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2527521262 + ... + 2527521277.

Almost surely, 2^40440340312 is an apocalyptic number.

It is an amenable number.

40440340312 is a deficient number, since it is larger than the sum of its proper divisors (35385297788).

40440340312 is a wasteful number, since it uses less digits than its factorization.

40440340312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055042545 (or 5055042541 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 40440340312 its reverse (21304304404), we get a palindrome (61744644716).

The spelling of 40440340312 in words is "forty billion, four hundred forty million, three hundred forty thousand, three hundred twelve".