688084542 has 12 divisors (see below), whose sum is σ = 1490849880. Its totient is φ = 229361508.

The previous prime is 688084519. The next prime is 688084547. The reversal of 688084542 is 245480886.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688084547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19113442 + ... + 19113477.

It is an arithmetic number, because the mean of its divisors is an integer number (124237490).

Almost surely, 2^688084542 is an apocalyptic number.

688084542 is an abundant number, since it is smaller than the sum of its proper divisors (802765338).

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

688084542 is a wasteful number, since it uses less digits than its factorization.

688084542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38226927 (or 38226924 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 45.

The square root of 688084542 is about 26231.3656144700. The cubic root of 688084542 is about 882.8371507756.

The spelling of 688084542 in words is "six hundred eighty-eight million, eighty-four thousand, five hundred forty-two".