216090612 has 48 divisors (see below), whose sum is σ = 584599680. Its totient is φ = 68897664.

The previous prime is 216090577. The next prime is 216090613.

216090612 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216090613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41013 + ... + 45980.

It is an arithmetic number, because the mean of its divisors is an integer number (12179160).

Almost surely, 2^216090612 is an apocalyptic number.

It is an amenable number.

216090612 is an abundant number, since it is smaller than the sum of its proper divisors (368509068).

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

216090612 is a wasteful number, since it uses less digits than its factorization.

216090612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87029 (or 87021 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 216090612 is about 14700.0208163118. The cubic root of 216090612 is about 600.0838882707.

The spelling of 216090612 in words is "two hundred sixteen million, ninety thousand, six hundred twelve".