4000444040 has 32 divisors (see below), whose sum is σ = 9135348480. Its totient is φ = 1576293312.

The previous prime is 4000444031. The next prime is 4000444051. The reversal of 4000444040 is 404440004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743672 + ... + 749031.

It is an arithmetic number, because the mean of its divisors is an integer number (285479640).

Almost surely, 2^4000444040 is an apocalyptic number.

4000444040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000444040 is an abundant number, since it is smaller than the sum of its proper divisors (5134904440).

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

4000444040 is a wasteful number, since it uses less digits than its factorization.

4000444040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492781 (or 1492777 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 4000444040 is about 63249.0635503799. The cubic root of 4000444040 is about 1587.4597889250.

Adding to 4000444040 its reverse (404440004), we get a palindrome (4404884044).

The spelling of 4000444040 in words is "four billion, four hundred forty-four thousand, forty".