400432330 has 8 divisors (see below), whose sum is σ = 720778212. Its totient is φ = 160172928.

The previous prime is 400432289. The next prime is 400432381. The reversal of 400432330 is 33234004.

It can be written as a sum of positive squares in 2 ways, for example, as 329821921 + 70610409 = 18161^2 + 8403^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 400432298 and 400432307.

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, 20021607 + ... + 20021626.

Almost surely, 2^400432330 is an apocalyptic number.

400432330 is a deficient number, since it is larger than the sum of its proper divisors (320345882).

400432330 is a wasteful number, since it uses less digits than its factorization.

400432330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40043240.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 400432330 is about 20010.8053311205. The cubic root of 400432330 is about 737.0716570391.

Adding to 400432330 its reverse (33234004), we get a palindrome (433666334).

The spelling of 400432330 in words is "four hundred million, four hundred thirty-two thousand, three hundred thirty".