688857450 has 96 divisors (see below), whose sum is σ = 1749798720. Its totient is φ = 179289600.

The previous prime is 688857443. The next prime is 688857487. The reversal of 688857450 is 54758886.

688857450 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 688857393 and 688857402.

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 47 ways as a sum of consecutive naturals, for example, 2451310 + ... + 2451590.

It is an arithmetic number, because the mean of its divisors is an integer number (18227070).

Almost surely, 2^688857450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688857450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874899360).

688857450 is an abundant number, since it is smaller than the sum of its proper divisors (1060941270).

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

688857450 is a wasteful number, since it uses less digits than its factorization.

688857450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The square root of 688857450 is about 26246.0939951072. The cubic root of 688857450 is about 883.1675833143.

The spelling of 688857450 in words is "six hundred eighty-eight million, eight hundred fifty-seven thousand, four hundred fifty".