216748788 has 24 divisors (see below), whose sum is σ = 507554880. Its totient is φ = 71991360.

The previous prime is 216748783. The next prime is 216748811. The reversal of 216748788 is 887847612.

It is a self number, because there is not a number n which added to its sum of digits gives 216748788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216748783) 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, 28768 + ... + 35511.

It is an arithmetic number, because the mean of its divisors is an integer number (21148120).

Almost surely, 2^216748788 is an apocalyptic number.

It is an amenable number.

216748788 is an abundant number, since it is smaller than the sum of its proper divisors (290806092).

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

216748788 is a wasteful number, since it uses less digits than its factorization.

216748788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64567 (or 64565 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The square root of 216748788 is about 14722.3907025999. The cubic root of 216748788 is about 600.6925226021.

The spelling of 216748788 in words is "two hundred sixteen million, seven hundred forty-eight thousand, seven hundred eighty-eight".