216690192 has 30 divisors (see below), whose sum is σ = 606431982. Its totient is φ = 72230016.

The previous prime is 216690191. The next prime is 216690197. The reversal of 216690192 is 291096612.

It can be written as a sum of positive squares in only one way, i.e., 122677776 + 94012416 = 11076^2 + 9696^2 .

It is a super-3 number, since 3×216690192³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (216690191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 752253 + ... + 752540.

Almost surely, 2^216690192 is an apocalyptic number.

It is an amenable number.

216690192 is an abundant number, since it is smaller than the sum of its proper divisors (389741790).

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

216690192 is a wasteful number, since it uses less digits than its factorization.

216690192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504807 (or 1504798 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 216690192 is about 14720.4005380288. The cubic root of 216690192 is about 600.6383871954.

The spelling of 216690192 in words is "two hundred sixteen million, six hundred ninety thousand, one hundred ninety-two".