1228695688 has 16 divisors (see below), whose sum is σ = 2513241360. Its totient is φ = 558498000.

The previous prime is 1228695649. The next prime is 1228695691. The reversal of 1228695688 is 8865968221.

It is a happy number.

It is a super-3 number, since 3×1228695688³ (a number of 28 digits) contains 333 as substring.

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, 6981138 + ... + 6981313.

It is an arithmetic number, because the mean of its divisors is an integer number (157077585).

Almost surely, 2^1228695688 is an apocalyptic number.

It is an amenable number.

1228695688 is an abundant number, since it is smaller than the sum of its proper divisors (1284545672).

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

1228695688 is a wasteful number, since it uses less digits than its factorization.

1228695688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13962468 (or 13962464 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 55.

The square root of 1228695688 is about 35052.7557832476. The cubic root of 1228695688 is about 1071.0624111619.

The spelling of 1228695688 in words is "one billion, two hundred twenty-eight million, six hundred ninety-five thousand, six hundred eighty-eight".