216986708 has 12 divisors (see below), whose sum is σ = 402063732. Its totient is φ = 102111360.

The previous prime is 216986687. The next prime is 216986711. The reversal of 216986708 is 807689612.

It can be written as a sum of positive squares in 2 ways, for example, as 187087684 + 29899024 = 13678^2 + 5468^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1595423 + ... + 1595558.

It is an arithmetic number, because the mean of its divisors is an integer number (33505311).

Almost surely, 2^216986708 is an apocalyptic number.

It is an amenable number.

216986708 is a deficient number, since it is larger than the sum of its proper divisors (185077024).

216986708 is a wasteful number, since it uses less digits than its factorization.

216986708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191002 (or 3191000 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 216986708 is about 14730.4686958698. The cubic root of 216986708 is about 600.9122308737.

The spelling of 216986708 in words is "two hundred sixteen million, nine hundred eighty-six thousand, seven hundred eight".