689496040 has 16 divisors (see below), whose sum is σ = 1551366180. Its totient is φ = 275798400.

The previous prime is 689496037. The next prime is 689496077. The reversal of 689496040 is 40694986.

It can be written as a sum of positive squares in 2 ways, for example, as 671535396 + 17960644 = 25914^2 + 4238^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8618661 + ... + 8618740.

Almost surely, 2^689496040 is an apocalyptic number.

It is an amenable number.

689496040 is an abundant number, since it is smaller than the sum of its proper divisors (861870140).

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

689496040 is a wasteful number, since it uses less digits than its factorization.

689496040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17237412 (or 17237408 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 689496040 is about 26258.2566062563. The cubic root of 689496040 is about 883.4404059915.

The spelling of 689496040 in words is "six hundred eighty-nine million, four hundred ninety-six thousand, forty".