216457888 has 12 divisors (see below), whose sum is σ = 426151530. Its totient is φ = 108228928.

The previous prime is 216457877. The next prime is 216457909. The reversal of 216457888 is 888754612.

216457888 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 199713424 + 16744464 = 14132^2 + 4092^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3382123 + ... + 3382186.

Almost surely, 2^216457888 is an apocalyptic number.

It is an amenable number.

216457888 is a deficient number, since it is larger than the sum of its proper divisors (209693642).

216457888 is an equidigital number, since it uses as much as digits as its factorization.

216457888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6764319 (or 6764311 counting only the distinct ones).

The product of its digits is 860160, while the sum is 49.

The square root of 216457888 is about 14712.5078759537. The cubic root of 216457888 is about 600.4236711379.

The spelling of 216457888 in words is "two hundred sixteen million, four hundred fifty-seven thousand, eight hundred eighty-eight".