216749706 has 24 divisors (see below), whose sum is σ = 447946272. Its totient is φ = 69917400.

The previous prime is 216749699. The next prime is 216749717. The reversal of 216749706 is 607947612.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13030 + ... + 24561.

It is an arithmetic number, because the mean of its divisors is an integer number (18664428).

Almost surely, 2^216749706 is an apocalyptic number.

216749706 is an abundant number, since it is smaller than the sum of its proper divisors (231196566).

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

216749706 is a wasteful number, since it uses less digits than its factorization.

216749706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37658 (or 37627 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 216749706 is about 14722.4218795686. The cubic root of 216749706 is about 600.6933706422.

The spelling of 216749706 in words is "two hundred sixteen million, seven hundred forty-nine thousand, seven hundred six".