400320330 has 16 divisors (see below), whose sum is σ = 960768864. Its totient is φ = 106752080.

The previous prime is 400320311. The next prime is 400320341. The reversal of 400320330 is 33023004.

It is a super-2 number, since 2×400320330² = 320512733222617800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 7 ways as a sum of consecutive naturals, for example, 6671976 + ... + 6672035.

It is an arithmetic number, because the mean of its divisors is an integer number (60048054).

Almost surely, 2^400320330 is an apocalyptic number.

400320330 is an abundant number, since it is smaller than the sum of its proper divisors (560448534).

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

400320330 is a wasteful number, since it uses less digits than its factorization.

400320330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13344021.

The product of its (nonzero) digits is 216, while the sum is 15.

The square root of 400320330 is about 20008.0066473400. The cubic root of 400320330 is about 737.0029315498.

Adding to 400320330 its reverse (33023004), we get a palindrome (433343334).

The spelling of 400320330 in words is "four hundred million, three hundred twenty thousand, three hundred thirty".