216436 has 12 divisors (see below), whose sum is σ = 413280. Its totient is φ = 98360.
The previous prime is 216431. The next prime is 216451. The reversal of 216436 is 634612.
It is a Harshad number since it is a multiple of its sum of digits (22).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (216431) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2416 + ... + 2503.
It is an arithmetic number, because the mean of its divisors is an integer number (34440).
2216436 is an apocalyptic number.
It is an amenable number.
216436 is a deficient number, since it is larger than the sum of its proper divisors (196844).
216436 is a wasteful number, since it uses less digits than its factorization.
216436 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4934 (or 4932 counting only the distinct ones).
The product of its digits is 864, while the sum is 22.
The square root of 216436 is about 465.2268263976. The cubic root of 216436 is about 60.0403432380.
The spelling of 216436 in words is "two hundred sixteen thousand, four hundred thirty-six".
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