689750256 has 80 divisors (see below), whose sum is σ = 1936716320. Its totient is φ = 210263040.

The previous prime is 689750249. The next prime is 689750261. The reversal of 689750256 is 652057986.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62946 + ... + 73086.

It is an arithmetic number, because the mean of its divisors is an integer number (24208954).

Almost surely, 2^689750256 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 689750256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968358160).

689750256 is an abundant number, since it is smaller than the sum of its proper divisors (1246966064).

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

689750256 is a wasteful number, since it uses less digits than its factorization.

689750256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10274 (or 10268 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 689750256 is about 26263.0968470971. The cubic root of 689750256 is about 883.5489669682.

The spelling of 689750256 in words is "six hundred eighty-nine million, seven hundred fifty thousand, two hundred fifty-six".