689940342 has 160 divisors (see below), whose sum is σ = 2015399232. Its totient is φ = 171196416.

The previous prime is 689940341. The next prime is 689940347. The reversal of 689940342 is 243049986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689940341) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 249238 + ... + 251990.

Almost surely, 2^689940342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689940342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007699616).

689940342 is an abundant number, since it is smaller than the sum of its proper divisors (1325458890).

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

689940342 is a wasteful number, since it uses less digits than its factorization.

689940342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804 (or 2795 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 689940342 is about 26266.7154779580. The cubic root of 689940342 is about 883.6301242961.

The spelling of 689940342 in words is "six hundred eighty-nine million, nine hundred forty thousand, three hundred forty-two".