689145804 has 36 divisors (see below), whose sum is σ = 1743476280. Its totient is φ = 229521600.

The previous prime is 689145781. The next prime is 689145859. The reversal of 689145804 is 408541986.

689145804 is a `hidden beast` number, since 68 + 9 + 1 + 4 + 580 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 689145804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38979 + ... + 53829.

Almost surely, 2^689145804 is an apocalyptic number.

It is an amenable number.

689145804 is an abundant number, since it is smaller than the sum of its proper divisors (1054330476).

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

689145804 is a wasteful number, since it uses less digits than its factorization.

689145804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16150 (or 16145 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 689145804 is about 26251.5866949028. The cubic root of 689145804 is about 883.2907967017.

The spelling of 689145804 in words is "six hundred eighty-nine million, one hundred forty-five thousand, eight hundred four".