688225164 has 24 divisors (see below), whose sum is σ = 1751846208. Its totient is φ = 208553040.

The previous prime is 688225133. The next prime is 688225217. The reversal of 688225164 is 461522886.

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, 2606782 + ... + 2607045.

It is an arithmetic number, because the mean of its divisors is an integer number (72993592).

Almost surely, 2^688225164 is an apocalyptic number.

It is an amenable number.

688225164 is an abundant number, since it is smaller than the sum of its proper divisors (1063621044).

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

688225164 is a wasteful number, since it uses less digits than its factorization.

688225164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5213845 (or 5213843 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 688225164 is about 26234.0458946004. The cubic root of 688225164 is about 882.8972877026.

The spelling of 688225164 in words is "six hundred eighty-eight million, two hundred twenty-five thousand, one hundred sixty-four".