216470090 has 16 divisors (see below), whose sum is σ = 396034920. Its totient is φ = 85168320.

The previous prime is 216470083. The next prime is 216470113. The reversal of 216470090 is 90074612.

It can be written as a sum of positive squares in 4 ways, for example, as 98942809 + 117527281 = 9947^2 + 10841^2 .

It is a Curzon 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, 176825 + ... + 178044.

Almost surely, 2^216470090 is an apocalyptic number.

216470090 is a deficient number, since it is larger than the sum of its proper divisors (179564830).

216470090 is a wasteful number, since it uses less digits than its factorization.

216470090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354937.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 216470090 is about 14712.9225512812. The cubic root of 216470090 is about 600.4349531353.

The spelling of 216470090 in words is "two hundred sixteen million, four hundred seventy thousand, ninety".