4000040040 has 32 divisors (see below), whose sum is σ = 12000120480. Its totient is φ = 1066677312.

The previous prime is 4000040039. The next prime is 4000040053. The reversal of 4000040040 is 400400004.

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.

4000040040 is a modest number, since divided by 40040 gives 4000 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 4000039998 and 4000040025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16666714 + ... + 16666953.

It is an arithmetic number, because the mean of its divisors is an integer number (375003765).

Almost surely, 2^4000040040 is an apocalyptic number.

4000040040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000040040 is an abundant number, since it is smaller than the sum of its proper divisors (8000080440).

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

4000040040 is a wasteful number, since it uses less digits than its factorization.

4000040040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333681 (or 33333677 counting only the distinct ones).

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

The square root of 4000040040 is about 63245.8697465692. The cubic root of 4000040040 is about 1587.4063485787.

Adding to 4000040040 its reverse (400400004), we get a palindrome (4400440044).

The spelling of 4000040040 in words is "four billion, forty thousand, forty", and thus it is an eban number.