400442450 has 24 divisors (see below), whose sum is σ = 745640148. Its totient is φ = 160001280.

The previous prime is 400442447. The next prime is 400442479. The reversal of 400442450 is 54244004.

It can be written as a sum of positive squares in 6 ways, for example, as 372065521 + 28376929 = 19289^2 + 5327^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47774 + ... + 55526.

Almost surely, 2^400442450 is an apocalyptic number.

400442450 is a deficient number, since it is larger than the sum of its proper divisors (345197698).

400442450 is a wasteful number, since it uses less digits than its factorization.

400442450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8798 (or 8793 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 400442450 is about 20011.0581929092. The cubic root of 400442450 is about 737.0778662466.

Adding to 400442450 its reverse (54244004), we get a palindrome (454686454).

The spelling of 400442450 in words is "four hundred million, four hundred forty-two thousand, four hundred fifty".