216695604 has 24 divisors (see below), whose sum is σ = 527607360. Its totient is φ = 69091264.

The previous prime is 216695599. The next prime is 216695663. The reversal of 216695604 is 406596612.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 392289 + ... + 392840.

It is an arithmetic number, because the mean of its divisors is an integer number (21983640).

Almost surely, 2^216695604 is an apocalyptic number.

It is an amenable number.

216695604 is an abundant number, since it is smaller than the sum of its proper divisors (310911756).

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

216695604 is a wasteful number, since it uses less digits than its factorization.

216695604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785159 (or 785157 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 216695604 is about 14720.5843634008. The cubic root of 216695604 is about 600.6433876185.

The spelling of 216695604 in words is "two hundred sixteen million, six hundred ninety-five thousand, six hundred four".