689617464 has 128 divisors (see below), whose sum is σ = 1935360000. Its totient is φ = 203727744.

The previous prime is 689617463. The next prime is 689617471. The reversal of 689617464 is 464716986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689617463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 492237 + ... + 493635.

It is an arithmetic number, because the mean of its divisors is an integer number (15120000).

Almost surely, 2^689617464 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 689617464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967680000).

689617464 is an abundant number, since it is smaller than the sum of its proper divisors (1245742536).

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

689617464 is a wasteful number, since it uses less digits than its factorization.

689617464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497 (or 1493 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 689617464 is about 26260.5686153213. The cubic root of 689617464 is about 883.4922624999.

The spelling of 689617464 in words is "six hundred eighty-nine million, six hundred seventeen thousand, four hundred sixty-four".