40004004040 has 128 divisors (see below), whose sum is σ = 120851377920. Its totient is φ = 11509632000.

The previous prime is 40004004023. The next prime is 40004004071. The reversal of 40004004040 is 4040040004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459511 + ... + 539590.

It is an arithmetic number, because the mean of its divisors is an integer number (944151390).

Almost surely, 2^40004004040 is an apocalyptic number.

40004004040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40004004040 is an abundant number, since it is smaller than the sum of its proper divisors (80847373880).

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

40004004040 is a wasteful number, since it uses less digits than its factorization.

40004004040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999143 (or 999139 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40004004040 its reverse (4040040004), we get a palindrome (44044044044).

The spelling of 40004004040 in words is "forty billion, four million, four thousand, forty", and thus it is an eban number.