406216 has 8 divisors (see below), whose sum is σ = 761670. Its totient is φ = 203104.

The previous prime is 406207. The next prime is 406247. The reversal of 406216 is 612604.

It can be written as a sum of positive squares in only one way, i.e., 280900 + 125316 = 530^2 + 354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×406216² = 330022877312, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 406193 and 406202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25381 + ... + 25396.

2⁴⁰⁶²¹⁶ is an apocalyptic number.

It is an amenable number.

406216 is a deficient number, since it is larger than the sum of its proper divisors (355454).

406216 is a wasteful number, since it uses less digits than its factorization.

406216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50783 (or 50779 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 406216 is about 637.3507668466. The cubic root of 406216 is about 74.0603355014.

The spelling of 406216 in words is "four hundred six thousand, two hundred sixteen".