400320232 has 16 divisors (see below), whose sum is σ = 808339140. Its totient is φ = 184763136.

The previous prime is 400320229. The next prime is 400320259. The reversal of 400320232 is 232023004.

It can be written as a sum of positive squares in 2 ways, for example, as 398960676 + 1359556 = 19974^2 + 1166^2 .

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, 1924513 + ... + 1924720.

Almost surely, 2^400320232 is an apocalyptic number.

It is an amenable number.

400320232 is an abundant number, since it is smaller than the sum of its proper divisors (408018908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400320232 is a wasteful number, since it uses less digits than its factorization.

400320232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849252 (or 3849248 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 400320232 is about 20008.0041983202. The cubic root of 400320232 is about 737.0028714094.

Adding to 400320232 its reverse (232023004), we get a palindrome (632343236).

The spelling of 400320232 in words is "four hundred million, three hundred twenty thousand, two hundred thirty-two".