688149846 has 24 divisors (see below), whose sum is σ = 1508958360. Its totient is φ = 226619136.

The previous prime is 688149841. The next prime is 688149853. The reversal of 688149846 is 648941886.

It is a junction number, because it is equal to n+sod(n) for n = 688149792 and 688149801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688149841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228811 + ... + 231798.

It is an arithmetic number, because the mean of its divisors is an integer number (62873265).

Almost surely, 2^688149846 is an apocalyptic number.

688149846 is an abundant number, since it is smaller than the sum of its proper divisors (820808514).

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

688149846 is a wasteful number, since it uses less digits than its factorization.

688149846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460700 (or 460697 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The square root of 688149846 is about 26232.6103542899. The cubic root of 688149846 is about 882.8650790169.

The spelling of 688149846 in words is "six hundred eighty-eight million, one hundred forty-nine thousand, eight hundred forty-six".