40340010442 has 4 divisors (see below), whose sum is σ = 60510015666. Its totient is φ = 20170005220.

The previous prime is 40340010433. The next prime is 40340010457. The reversal of 40340010442 is 24401004304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37014296881 + 3325713561 = 192391^2 + 57669^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10085002609 + ... + 10085002612.

Almost surely, 2^40340010442 is an apocalyptic number.

40340010442 is a deficient number, since it is larger than the sum of its proper divisors (20170005224).

40340010442 is a wasteful number, since it uses less digits than its factorization.

40340010442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20170005223.

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

Adding to 40340010442 its reverse (24401004304), we get a palindrome (64741014746).

The spelling of 40340010442 in words is "forty billion, three hundred forty million, ten thousand, four hundred forty-two".