688845472 has 24 divisors (see below), whose sum is σ = 1549902816. Its totient is φ = 295219392.

The previous prime is 688845463. The next prime is 688845481. The reversal of 688845472 is 274548886.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (688845463) and next prime (688845481).

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 in 3 ways as a sum of consecutive naturals, for example, 1537378 + ... + 1537825.

It is an arithmetic number, because the mean of its divisors is an integer number (64579284).

Almost surely, 2^688845472 is an apocalyptic number.

It is an amenable number.

688845472 is an abundant number, since it is smaller than the sum of its proper divisors (861057344).

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

688845472 is a wasteful number, since it uses less digits than its factorization.

688845472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075220 (or 3075212 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 52.

The square root of 688845472 is about 26245.8658077801. The cubic root of 688845472 is about 883.1624643827.

The spelling of 688845472 in words is "six hundred eighty-eight million, eight hundred forty-five thousand, four hundred seventy-two".