216667794 has 32 divisors (see below), whose sum is σ = 496198656. Its totient is φ = 61785360.

The previous prime is 216667793. The next prime is 216667799. The reversal of 216667794 is 497766612.

It is not an unprimeable number, because it can be changed into a prime (216667793) 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 15 ways as a sum of consecutive naturals, for example, 18259 + ... + 27689.

It is an arithmetic number, because the mean of its divisors is an integer number (15506208).

Almost surely, 2^216667794 is an apocalyptic number.

216667794 is an abundant number, since it is smaller than the sum of its proper divisors (279530862).

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

216667794 is a wasteful number, since it uses less digits than its factorization.

216667794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9990.

The product of its digits is 762048, while the sum is 48.

The square root of 216667794 is about 14719.6397374392. The cubic root of 216667794 is about 600.6176916546.

The spelling of 216667794 in words is "two hundred sixteen million, six hundred sixty-seven thousand, seven hundred ninety-four".