688903452 has 72 divisors (see below), whose sum is σ = 1875793920. Its totient is φ = 212556960.

The previous prime is 688903367. The next prime is 688903471. The reversal of 688903452 is 254309886.

688903452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 688903398 and 688903407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12249 + ... + 39087.

Almost surely, 2^688903452 is an apocalyptic number.

688903452 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688903452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937896960).

688903452 is an abundant number, since it is smaller than the sum of its proper divisors (1186890468).

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

688903452 is a wasteful number, since it uses less digits than its factorization.

688903452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26903 (or 26898 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 688903452 is about 26246.9703394506. The cubic root of 688903452 is about 883.1872422297.

The spelling of 688903452 in words is "six hundred eighty-eight million, nine hundred three thousand, four hundred fifty-two".