689271426 has 48 divisors (see below), whose sum is σ = 1588395744. Its totient is φ = 215267712.

The previous prime is 689271397. The next prime is 689271437. The reversal of 689271426 is 624172986.

It is a happy 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, 64501 + ... + 74423.

It is an arithmetic number, because the mean of its divisors is an integer number (33091578).

Almost surely, 2^689271426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689271426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794197872).

689271426 is an abundant number, since it is smaller than the sum of its proper divisors (899124318).

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

689271426 is a wasteful number, since it uses less digits than its factorization.

689271426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10175 (or 10172 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 689271426 is about 26253.9792412503. The cubic root of 689271426 is about 883.3444641135.

The spelling of 689271426 in words is "six hundred eighty-nine million, two hundred seventy-one thousand, four hundred twenty-six".