40343344434 has 128 divisors (see below), whose sum is σ = 93405312000. Its totient is φ = 12899637504.

The previous prime is 40343344427. The next prime is 40343344439. The reversal of 40343344434 is 43444334304.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40343344439) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24643864 + ... + 24645500.

It is an arithmetic number, because the mean of its divisors is an integer number (729729000).

Almost surely, 2^40343344434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40343344434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46702656000).

40343344434 is an abundant number, since it is smaller than the sum of its proper divisors (53061967566).

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

40343344434 is a wasteful number, since it uses less digits than its factorization.

40343344434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889 (or 1883 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 36.

Adding to 40343344434 its reverse (43444334304), we get a palindrome (83787678738).

The spelling of 40343344434 in words is "forty billion, three hundred forty-three million, three hundred forty-four thousand, four hundred thirty-four".