40004440390 has 16 divisors (see below), whose sum is σ = 72011873232. Its totient is φ = 16000913824.

The previous prime is 40004440381. The next prime is 40004440391. The reversal of 40004440390 is 9304440004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40004440391) 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, 107532 + ... + 302608.

It is an arithmetic number, because the mean of its divisors is an integer number (4500742077).

Almost surely, 2^40004440390 is an apocalyptic number.

40004440390 is a deficient number, since it is larger than the sum of its proper divisors (32007432842).

40004440390 is a wasteful number, since it uses less digits than its factorization.

40004440390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215591.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 40004440390 its reverse (9304440004), we get a palindrome (49308880394).

The spelling of 40004440390 in words is "forty billion, four million, four hundred forty thousand, three hundred ninety".