689278320 has 60 divisors (see below), whose sum is σ = 2314828776. Its totient is φ = 183807360.

The previous prime is 689278313. The next prime is 689278327. The reversal of 689278320 is 23872986.

It is an interprime number because it is at equal distance from previous prime (689278313) and next prime (689278327).

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689278327) 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 11 ways as a sum of consecutive naturals, for example, 477946 + ... + 479385.

Almost surely, 2^689278320 is an apocalyptic number.

689278320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689278320 is an abundant number, since it is smaller than the sum of its proper divisors (1625550456).

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

689278320 is a wasteful number, since it uses less digits than its factorization.

689278320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957350 (or 957341 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 689278320 is about 26254.1105353048. The cubic root of 689278320 is about 883.3474091345.

The spelling of 689278320 in words is "six hundred eighty-nine million, two hundred seventy-eight thousand, three hundred twenty".