689894928 has 80 divisors (see below), whose sum is σ = 1983851200. Its totient is φ = 229547520.

The previous prime is 689894923. The next prime is 689894951. The reversal of 689894928 is 829498986.

689894928 is a `hidden beast` number, since 68 + 9 + 89 + 492 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (689894923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318168 + ... + 320328.

It is an arithmetic number, because the mean of its divisors is an integer number (24798140).

Almost surely, 2^689894928 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 689894928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991925600).

689894928 is an abundant number, since it is smaller than the sum of its proper divisors (1293956272).

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

689894928 is a wasteful number, since it uses less digits than its factorization.

689894928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917 (or 2905 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The square root of 689894928 is about 26265.8509856429. The cubic root of 689894928 is about 883.6107361178.

The spelling of 689894928 in words is "six hundred eighty-nine million, eight hundred ninety-four thousand, nine hundred twenty-eight".