40400120442 has 16 divisors (see below), whose sum is σ = 88145717472. Its totient is φ = 12242460720.

The previous prime is 40400120417. The next prime is 40400120447. The reversal of 40400120442 is 24402100404.

It is not an unprimeable number, because it can be changed into a prime (40400120447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306061453 + ... + 306061584.

It is an arithmetic number, because the mean of its divisors is an integer number (5509107342).

Almost surely, 2^40400120442 is an apocalyptic number.

40400120442 is an abundant number, since it is smaller than the sum of its proper divisors (47745597030).

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

40400120442 is a wasteful number, since it uses less digits than its factorization.

40400120442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612123053.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 40400120442 its reverse (24402100404), we get a palindrome (64802220846).

The spelling of 40400120442 in words is "forty billion, four hundred million, one hundred twenty thousand, four hundred forty-two".