688134132 has 36 divisors (see below), whose sum is σ = 1987943776. Its totient is φ = 196609680.

The previous prime is 688134121. The next prime is 688134157. The reversal of 688134132 is 231431886.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1365094 + ... + 1365597.

Almost surely, 2^688134132 is an apocalyptic number.

It is an amenable number.

688134132 is an abundant number, since it is smaller than the sum of its proper divisors (1299809644).

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

688134132 is a wasteful number, since it uses less digits than its factorization.

688134132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730708 (or 2730703 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 688134132 is about 26232.3108398784. The cubic root of 688134132 is about 882.8583588491.

The spelling of 688134132 in words is "six hundred eighty-eight million, one hundred thirty-four thousand, one hundred thirty-two".