688865412 has 12 divisors (see below), whose sum is σ = 1607352656. Its totient is φ = 229621800.

The previous prime is 688865383. The next prime is 688865423. The reversal of 688865412 is 214568886.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 28702714 + ... + 28702737.

Almost surely, 2^688865412 is an apocalyptic number.

It is an amenable number.

688865412 is an abundant number, since it is smaller than the sum of its proper divisors (918487244).

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

688865412 is a wasteful number, since it uses less digits than its factorization.

688865412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57405458 (or 57405456 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The square root of 688865412 is about 26246.2456743817. The cubic root of 688865412 is about 883.1709859309.

The spelling of 688865412 in words is "six hundred eighty-eight million, eight hundred sixty-five thousand, four hundred twelve".