216776476 has 12 divisors (see below), whose sum is σ = 433553008. Its totient is φ = 92904192.

The previous prime is 216776467. The next prime is 216776501. The reversal of 216776476 is 674677612.

216776476 is an admirable number.

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, 3870981 + ... + 3871036.

Almost surely, 2^216776476 is an apocalyptic number.

It is an amenable number.

216776476 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216776476 is a wasteful number, since it uses less digits than its factorization.

216776476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742028 (or 7742026 counting only the distinct ones).

The product of its digits is 592704, while the sum is 46.

The square root of 216776476 is about 14723.3310089803. The cubic root of 216776476 is about 600.7180994716.

The spelling of 216776476 in words is "two hundred sixteen million, seven hundred seventy-six thousand, four hundred seventy-six".