689441930 has 32 divisors (see below), whose sum is σ = 1262847888. Its totient is φ = 270950400.

The previous prime is 689441917. The next prime is 689441939. The reversal of 689441930 is 39144986.

It can be written as a sum of positive squares in 8 ways, for example, as 468592609 + 220849321 = 21647^2 + 14861^2 .

It is not an unprimeable number, because it can be changed into a prime (689441939) 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, 203450 + ... + 206810.

Almost surely, 2^689441930 is an apocalyptic number.

689441930 is a deficient number, since it is larger than the sum of its proper divisors (573405958).

689441930 is a wasteful number, since it uses less digits than its factorization.

689441930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 689441930 is about 26257.2262434553. The cubic root of 689441930 is about 883.4172952903.

The spelling of 689441930 in words is "six hundred eighty-nine million, four hundred forty-one thousand, nine hundred thirty".