400144004 has 24 divisors (see below), whose sum is σ = 758596440. Its totient is φ = 184677792.

The previous prime is 400143929. The next prime is 400144049. The reversal of 400144004 is 400441004.

It can be written as a sum of positive squares in 4 ways, for example, as 122988100 + 277155904 = 11090^2 + 16648^2 .

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, 13979 + ... + 31554.

It is an arithmetic number, because the mean of its divisors is an integer number (31608185).

Almost surely, 2^400144004 is an apocalyptic number.

It is an amenable number.

400144004 is a deficient number, since it is larger than the sum of its proper divisors (358452436).

400144004 is a wasteful number, since it uses less digits than its factorization.

400144004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45576 (or 45548 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 400144004 is about 20003.5997760403. The cubic root of 400144004 is about 736.8947083316.

Adding to 400144004 its reverse (400441004), we get a palindrome (800585008).

The spelling of 400144004 in words is "four hundred million, one hundred forty-four thousand, four".