400440364 has 12 divisors (see below), whose sum is σ = 701764000. Its totient is φ = 199936368.

The previous prime is 400440353. The next prime is 400440377. The reversal of 400440364 is 463044004.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67764 + ... + 73435.

Almost surely, 2^400440364 is an apocalyptic number.

It is an amenable number.

400440364 is a deficient number, since it is larger than the sum of its proper divisors (301323636).

400440364 is a wasteful number, since it uses less digits than its factorization.

400440364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141912 (or 141910 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 400440364 is about 20011.0060716597. The cubic root of 400440364 is about 737.0765863731.

Adding to 400440364 its reverse (463044004), we get a palindrome (863484368).

The spelling of 400440364 in words is "four hundred million, four hundred forty thousand, three hundred sixty-four".