400000044 has 48 divisors (see below), whose sum is σ = 964613888. Its totient is φ = 128910528.

The previous prime is 400000043. The next prime is 400000049. The reversal of 400000044 is 440000004.

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

400000044 is a modest number, since divided by 44 gives 4 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 399999975 and 400000029.

It is not an unprimeable number, because it can be changed into a prime (400000043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69609 + ... + 75135.

Almost surely, 2^400000044 is an apocalyptic number.

It is an amenable number.

400000044 is an abundant number, since it is smaller than the sum of its proper divisors (564613844).

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

400000044 is a wasteful number, since it uses less digits than its factorization.

400000044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5734 (or 5732 counting only the distinct ones).

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

The square root of 400000044 is about 20000.0011000000. The cubic root of 400000044 is about 736.8063267443.

Adding to 400000044 its reverse (440000004), we get a palindrome (840000048).

The spelling of 400000044 in words is "four hundred million, forty-four", and thus it is an aban number.