40040000040 has 64 divisors (see below), whose sum is σ = 127185888960. Its totient is φ = 10049254400.

The previous prime is 40040000027. The next prime is 40040000069. The reversal of 40040000040 is 4000004004.

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 a junction number, because it is equal to n+sod(n) for n = 40039999980 and 40040000025.

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, 9811686 + ... + 9815765.

It is an arithmetic number, because the mean of its divisors is an integer number (1987279515).

Almost surely, 2^40040000040 is an apocalyptic number.

40040000040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040000040 is an abundant number, since it is smaller than the sum of its proper divisors (87145888920).

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

40040000040 is a wasteful number, since it uses less digits than its factorization.

40040000040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19627482 (or 19627478 counting only the distinct ones).

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

Adding to 40040000040 its reverse (4000004004), we get a palindrome (44040004044).

The spelling of 40040000040 in words is "forty billion, forty million, forty", and thus it is an aban number, an eban number, and an uban number.