40204440442 has 4 divisors (see below), whose sum is σ = 60306660666. Its totient is φ = 20102220220.

The previous prime is 40204440413. The next prime is 40204440443. The reversal of 40204440442 is 24404440204.

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., 31321566441 + 8882874001 = 176979^2 + 94249^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40204440442.

It is not an unprimeable number, because it can be changed into a prime (40204440443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051110109 + ... + 10051110112.

Almost surely, 2^40204440442 is an apocalyptic number.

40204440442 is a deficient number, since it is larger than the sum of its proper divisors (20102220224).

40204440442 is a wasteful number, since it uses less digits than its factorization.

40204440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20102220223.

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 40204440442 its reverse (24404440204), we get a palindrome (64608880646).

The spelling of 40204440442 in words is "forty billion, two hundred four million, four hundred forty thousand, four hundred forty-two".