400322242 has 4 divisors (see below), whose sum is σ = 600483366. Its totient is φ = 200161120.

The previous prime is 400322231. The next prime is 400322243. The reversal of 400322242 is 242223004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 392079601 + 8242641 = 19801^2 + 2871^2 .

It is not an unprimeable number, because it can be changed into a prime (400322243) by changing a digit.

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 as a sum of consecutive naturals, namely, 100080559 + ... + 100080562.

Almost surely, 2^400322242 is an apocalyptic number.

400322242 is a deficient number, since it is larger than the sum of its proper divisors (200161124).

400322242 is a wasteful number, since it uses less digits than its factorization.

400322242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200161123.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 400322242 is about 20008.0544281547. The cubic root of 400322242 is about 737.0041048997.

Adding to 400322242 its reverse (242223004), we get a palindrome (642545246).

The spelling of 400322242 in words is "four hundred million, three hundred twenty-two thousand, two hundred forty-two".