400216169 has 8 divisors (see below), whose sum is σ = 431089152. Its totient is φ = 370465920.

The previous prime is 400216163. The next prime is 400216177. The reversal of 400216169 is 961612004.

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

It is a cyclic number.

It is not a de Polignac number, because 400216169 - 2¹² = 400212073 is a prime.

It is a super-2 number, since 2×400216169² = 320345963858073122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400216163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279944 + ... + 281369.

It is an arithmetic number, because the mean of its divisors is an integer number (53886144).

Almost surely, 2^400216169 is an apocalyptic number.

It is an amenable number.

400216169 is a deficient number, since it is larger than the sum of its proper divisors (30872983).

400216169 is a wasteful number, since it uses less digits than its factorization.

400216169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561367.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 400216169 is about 20005.4034950560. The cubic root of 400216169 is about 736.9390047262.

The spelling of 400216169 in words is "four hundred million, two hundred sixteen thousand, one hundred sixty-nine".