40400422442 has 4 divisors (see below), whose sum is σ = 60600633666. Its totient is φ = 20200211220.

The previous prime is 40400422357. The next prime is 40400422471. The reversal of 40400422442 is 24422400404.

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., 38525445841 + 1874976601 = 196279^2 + 43301^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100105609 + ... + 10100105612.

Almost surely, 2^40400422442 is an apocalyptic number.

40400422442 is a deficient number, since it is larger than the sum of its proper divisors (20200211224).

40400422442 is a wasteful number, since it uses less digits than its factorization.

40400422442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20200211223.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 40400422442 its reverse (24422400404), we get a palindrome (64822822846).

The spelling of 40400422442 in words is "forty billion, four hundred million, four hundred twenty-two thousand, four hundred forty-two".