689414784 has 64 divisors (see below), whose sum is σ = 1880790240. Its totient is φ = 223589376.

The previous prime is 689414779. The next prime is 689414807. The reversal of 689414784 is 487414986.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10054 + ... + 38469.

Almost surely, 2^689414784 is an apocalyptic number.

689414784 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

689414784 is an abundant number, since it is smaller than the sum of its proper divisors (1191375456).

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

689414784 is a wasteful number, since it uses less digits than its factorization.

689414784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48577 (or 48565 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 689414784 is about 26256.7093140020. The cubic root of 689414784 is about 883.4057006176.

The spelling of 689414784 in words is "six hundred eighty-nine million, four hundred fourteen thousand, seven hundred eighty-four".