40004000040 has 64 divisors (see below), whose sum is σ = 120028132800. Its totient is φ = 10666299392.

The previous prime is 40003999963. The next prime is 40004000077. The reversal of 40004000040 is 4000040004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1112584 + ... + 1147976.

It is an arithmetic number, because the mean of its divisors is an integer number (1875439575).

Almost surely, 2^40004000040 is an apocalyptic number.

40004000040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40004000040 is an abundant number, since it is smaller than the sum of its proper divisors (80024132760).

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

40004000040 is a wasteful number, since it uses less digits than its factorization.

40004000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44826 (or 44822 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

Adding to 40004000040 its reverse (4000040004), we get a palindrome (44004040044).

The spelling of 40004000040 in words is "forty billion, four million, forty", and thus it is an aban number and an eban number.