689747748 has 24 divisors (see below), whose sum is σ = 1643655552. Its totient is φ = 225023904.

The previous prime is 689747717. The next prime is 689747761. The reversal of 689747748 is 847747986.

It is a junction number, because it is equal to n+sod(n) for n = 689747691 and 689747700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610915 + ... + 612042.

It is an arithmetic number, because the mean of its divisors is an integer number (68485648).

Almost surely, 2^689747748 is an apocalyptic number.

It is an amenable number.

689747748 is an abundant number, since it is smaller than the sum of its proper divisors (953907804).

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

689747748 is a wasteful number, since it uses less digits than its factorization.

689747748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223011 (or 1223009 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 60.

The square root of 689747748 is about 26263.0490994477. The cubic root of 689747748 is about 883.5478960765.

It can be divided in two parts, 6897 and 47748, that added together give a palindrome (54645).

The spelling of 689747748 in words is "six hundred eighty-nine million, seven hundred forty-seven thousand, seven hundred forty-eight".