216384370 has 16 divisors (see below), whose sum is σ = 402923160. Its totient is φ = 83569024.

The previous prime is 216384361. The next prime is 216384383. The reversal of 216384370 is 73483612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 126495009 + 89889361 = 11247^2 + 9481^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372787 + ... + 373366.

Almost surely, 2^216384370 is an apocalyptic number.

216384370 is a deficient number, since it is larger than the sum of its proper divisors (186538790).

216384370 is a wasteful number, since it uses less digits than its factorization.

216384370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746189.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 216384370 is about 14710.0091774275. The cubic root of 216384370 is about 600.3556872508.

The spelling of 216384370 in words is "two hundred sixteen million, three hundred eighty-four thousand, three hundred seventy".