689639046 has 36 divisors (see below), whose sum is σ = 1408304268. Its totient is φ = 225141000.

The previous prime is 689639011. The next prime is 689639047. The reversal of 689639046 is 640936986.

It is a self number, because there is not a number n which added to its sum of digits gives 689639046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689639047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4567071 + ... + 4567221.

It is an arithmetic number, because the mean of its divisors is an integer number (39119563).

Almost surely, 2^689639046 is an apocalyptic number.

689639046 is an abundant number, since it is smaller than the sum of its proper divisors (718665222).

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

689639046 is an equidigital number, since it uses as much as digits as its factorization.

689639046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The square root of 689639046 is about 26260.9795323785. The cubic root of 689639046 is about 883.5014788805.

The spelling of 689639046 in words is "six hundred eighty-nine million, six hundred thirty-nine thousand, forty-six".