400021322 has 32 divisors (see below), whose sum is σ = 646833600. Its totient is φ = 184866048.

The previous prime is 400021309. The next prime is 400021333. The reversal of 400021322 is 223120004.

It is a junction number, because it is equal to n+sod(n) for n = 400021297 and 400021306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 645929 + ... + 646547.

It is an arithmetic number, because the mean of its divisors is an integer number (20213550).

Almost surely, 2^400021322 is an apocalyptic number.

400021322 is a deficient number, since it is larger than the sum of its proper divisors (246812278).

400021322 is a wasteful number, since it uses less digits than its factorization.

400021322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 400021322 is about 20000.5330428966. The cubic root of 400021322 is about 736.8193913154.

Adding to 400021322 its reverse (223120004), we get a palindrome (623141326).

The spelling of 400021322 in words is "four hundred million, twenty-one thousand, three hundred twenty-two".