216427790 has 16 divisors (see below), whose sum is σ = 389865312. Its totient is φ = 86505504.

The previous prime is 216427787. The next prime is 216427793. The reversal of 216427790 is 97724612.

It is an interprime number because it is at equal distance from previous prime (216427787) and next prime (216427793).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216427793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6992 + ... + 21948.

It is an arithmetic number, because the mean of its divisors is an integer number (24366582).

Almost surely, 2^216427790 is an apocalyptic number.

216427790 is a deficient number, since it is larger than the sum of its proper divisors (173437522).

216427790 is a wasteful number, since it uses less digits than its factorization.

216427790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16411.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 216427790 is about 14711.4849692341. The cubic root of 216427790 is about 600.3958406447.

The spelling of 216427790 in words is "two hundred sixteen million, four hundred twenty-seven thousand, seven hundred ninety".