400447330 has 16 divisors (see below), whose sum is σ = 734406264. Its totient is φ = 157156480.

The previous prime is 400447321. The next prime is 400447351. The reversal of 400447330 is 33744004.

It can be written as a sum of positive squares in 4 ways, for example, as 400280049 + 167281 = 20007^2 + 409^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400447295 and 400447304.

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, 377251 + ... + 378310.

Almost surely, 2^400447330 is an apocalyptic number.

400447330 is a deficient number, since it is larger than the sum of its proper divisors (333958934).

400447330 is a wasteful number, since it uses less digits than its factorization.

400447330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755621.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 400447330 is about 20011.1801251201. The cubic root of 400447330 is about 737.0808603725.

It can be divided in two parts, 40044 and 7330, that added together give a palindrome (47374).

The spelling of 400447330 in words is "four hundred million, four hundred forty-seven thousand, three hundred thirty".