1688416228 has 24 divisors (see below), whose sum is σ = 3113560800. Its totient is φ = 798922368.

The previous prime is 1688416207. The next prime is 1688416243. The reversal of 1688416228 is 8226148861.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62883 + ... + 85621.

It is an arithmetic number, because the mean of its divisors is an integer number (129731700).

Almost surely, 2^1688416228 is an apocalyptic number.

It is an amenable number.

1688416228 is a deficient number, since it is larger than the sum of its proper divisors (1425144572).

1688416228 is a wasteful number, since it uses less digits than its factorization.

1688416228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23739 (or 23737 counting only the distinct ones).

The product of its digits is 294912, while the sum is 46.

The square root of 1688416228 is about 41090.3422716336. The cubic root of 1688416228 is about 1190.7662198124.

The spelling of 1688416228 in words is "one billion, six hundred eighty-eight million, four hundred sixteen thousand, two hundred twenty-eight".