689689472 has 64 divisors (see below), whose sum is σ = 1425360240. Its totient is φ = 332144640.

The previous prime is 689689453. The next prime is 689689487. The reversal of 689689472 is 274986986.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 506072 + ... + 507432.

Almost surely, 2^689689472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689689472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712680120).

689689472 is an abundant number, since it is smaller than the sum of its proper divisors (735670768).

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

689689472 is a wasteful number, since it uses less digits than its factorization.

689689472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519 (or 1507 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 59.

The square root of 689689472 is about 26261.9396084905. The cubic root of 689689472 is about 883.5230120579.

The spelling of 689689472 in words is "six hundred eighty-nine million, six hundred eighty-nine thousand, four hundred seventy-two".