4004000040 has 128 divisors (see below), whose sum is σ = 12320288640. Its totient is φ = 1040449536.

The previous prime is 4004000023. The next prime is 4004000059. The reversal of 4004000040 is 400004004.

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 31 ways as a sum of consecutive naturals, for example, 3472104 + ... + 3473256.

It is an arithmetic number, because the mean of its divisors is an integer number (96252255).

Almost surely, 2^4004000040 is an apocalyptic number.

4004000040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4004000040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6160144320).

4004000040 is an abundant number, since it is smaller than the sum of its proper divisors (8316288600).

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

4004000040 is a wasteful number, since it uses less digits than its factorization.

4004000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883 (or 1879 counting only the distinct ones).

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

The square root of 4004000040 is about 63277.1683942953. The cubic root of 4004000040 is about 1587.9300146600.

Adding to 4004000040 its reverse (400004004), we get a palindrome (4404004044).

The spelling of 4004000040 in words is "four billion, four million, forty", and thus it is an aban number and an eban number.