400421132 has 12 divisors (see below), whose sum is σ = 701558760. Its totient is φ = 199975776.

The previous prime is 400421123. The next prime is 400421149. The reversal of 400421132 is 231124004.

It is a super-2 number, since 2×400421132² = 320674165904322848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400421132.

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, 54833 + ... + 61704.

It is an arithmetic number, because the mean of its divisors is an integer number (58463230).

Almost surely, 2^400421132 is an apocalyptic number.

It is an amenable number.

400421132 is a deficient number, since it is larger than the sum of its proper divisors (301137628).

400421132 is a wasteful number, since it uses less digits than its factorization.

400421132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117400 (or 117398 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400421132 is about 20010.5255303303. The cubic root of 400421132 is about 737.0647862940.

Adding to 400421132 its reverse (231124004), we get a palindrome (631545136).

The spelling of 400421132 in words is "four hundred million, four hundred twenty-one thousand, one hundred thirty-two".