216692970 has 64 divisors (see below), whose sum is σ = 563794560. Its totient is φ = 52985088.

The previous prime is 216692947. The next prime is 216692977. The reversal of 216692970 is 79296612.

It is not an unprimeable number, because it can be changed into a prime (216692977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59461 + ... + 62999.

It is an arithmetic number, because the mean of its divisors is an integer number (8809290).

Almost surely, 2^216692970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216692970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281897280).

216692970 is an abundant number, since it is smaller than the sum of its proper divisors (347101590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216692970 is a wasteful number, since it uses less digits than its factorization.

216692970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 216692970 is about 14720.4948965719. The cubic root of 216692970 is about 600.6409539418.

The spelling of 216692970 in words is "two hundred sixteen million, six hundred ninety-two thousand, nine hundred seventy".