688288134 has 32 divisors (see below), whose sum is σ = 1427825376. Its totient is φ = 221011200.

The previous prime is 688288121. The next prime is 688288141. The reversal of 688288134 is 431882886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7074 + ... + 37770.

It is an arithmetic number, because the mean of its divisors is an integer number (44619543).

Almost surely, 2^688288134 is an apocalyptic number.

688288134 is an abundant number, since it is smaller than the sum of its proper divisors (739537242).

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

688288134 is a wasteful number, since it uses less digits than its factorization.

688288134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30840.

The product of its digits is 589824, while the sum is 48.

The square root of 688288134 is about 26235.2460251472. The cubic root of 688288134 is about 882.9242141358.

The spelling of 688288134 in words is "six hundred eighty-eight million, two hundred eighty-eight thousand, one hundred thirty-four".