1688223285 has 96 divisors (see below), whose sum is σ = 3414528000. Its totient is φ = 755733888.

The previous prime is 1688223281. The next prime is 1688223293. The reversal of 1688223285 is 5823228861.

It is not a de Polignac number, because 1688223285 - 2² = 1688223281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1688223285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688223281) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4454226 + ... + 4454604.

It is an arithmetic number, because the mean of its divisors is an integer number (35568000).

Almost surely, 2^1688223285 is an apocalyptic number.

1688223285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1688223285 is an abundant number, since it is smaller than the sum of its proper divisors (1726304715).

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

1688223285 is a wasteful number, since it uses less digits than its factorization.

1688223285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 652 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 1688223285 is about 41087.9944144272. The cubic root of 1688223285 is about 1190.7208599943.

The spelling of 1688223285 in words is "one billion, six hundred eighty-eight million, two hundred twenty-three thousand, two hundred eighty-five".