688229556 has 24 divisors (see below), whose sum is σ = 1835279040. Its totient is φ = 196636992.

The previous prime is 688229471. The next prime is 688229573. The reversal of 688229556 is 655922886.

It is a junction number, because it is equal to n+sod(n) for n = 688229499 and 688229508.

It is a congruent number.

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, 4096521 + ... + 4096688.

It is an arithmetic number, because the mean of its divisors is an integer number (76469960).

Almost surely, 2^688229556 is an apocalyptic number.

It is an amenable number.

688229556 is an abundant number, since it is smaller than the sum of its proper divisors (1147049484).

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

688229556 is a wasteful number, since it uses less digits than its factorization.

688229556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193223 (or 8193221 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 51.

The square root of 688229556 is about 26234.1296024854. The cubic root of 688229556 is about 882.8991658072.

The spelling of 688229556 in words is "six hundred eighty-eight million, two hundred twenty-nine thousand, five hundred fifty-six".