400209229 has 8 divisors (see below), whose sum is σ = 457524288. Its totient is φ = 342929760.

The previous prime is 400209221. The next prime is 400209247. The reversal of 400209229 is 922902004.

It is a happy number.

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 400209229 - 2³ = 400209221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400209197 and 400209206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400209221) 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, 22689 + ... + 36265.

It is an arithmetic number, because the mean of its divisors is an integer number (57190536).

Almost surely, 2^400209229 is an apocalyptic number.

It is an amenable number.

400209229 is a deficient number, since it is larger than the sum of its proper divisors (57315059).

400209229 is a wasteful number, since it uses less digits than its factorization.

400209229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17795.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 400209229 is about 20005.2300411667. The cubic root of 400209229 is about 736.9347450397.

The spelling of 400209229 in words is "four hundred million, two hundred nine thousand, two hundred twenty-nine".