400222405 has 8 divisors (see below), whose sum is σ = 523927584. Its totient is φ = 291070800.

The previous prime is 400222397. The next prime is 400222411. The reversal of 400222405 is 504222004.

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

It is not a de Polignac number, because 400222405 - 2³ = 400222397 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 3638331 + ... + 3638440.

It is an arithmetic number, because the mean of its divisors is an integer number (65490948).

Almost surely, 2^400222405 is an apocalyptic number.

It is an amenable number.

400222405 is a deficient number, since it is larger than the sum of its proper divisors (123705179).

400222405 is a wasteful number, since it uses less digits than its factorization.

400222405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276787.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 400222405 is about 20005.5593523400. The cubic root of 400222405 is about 736.9428322642.

Adding to 400222405 its reverse (504222004), we get a palindrome (904444409).

The spelling of 400222405 in words is "four hundred million, two hundred twenty-two thousand, four hundred five".