400037444 has 6 divisors (see below), whose sum is σ = 700065534. Its totient is φ = 200018720.

The previous prime is 400037431. The next prime is 400037453. The reversal of 400037444 is 444730004.

It can be written as a sum of positive squares in only one way, i.e., 398800900 + 1236544 = 19970^2 + 1112^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50004677 + ... + 50004684.

It is an arithmetic number, because the mean of its divisors is an integer number (116677589).

Almost surely, 2^400037444 is an apocalyptic number.

It is an amenable number.

400037444 is a deficient number, since it is larger than the sum of its proper divisors (300028090).

400037444 is a wasteful number, since it uses less digits than its factorization.

400037444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100009365 (or 100009363 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 400037444 is about 20000.9360780939. The cubic root of 400037444 is about 736.8292898233.

Adding to 400037444 its reverse (444730004), we get a palindrome (844767448).

The spelling of 400037444 in words is "four hundred million, thirty-seven thousand, four hundred forty-four".