689396440 has 32 divisors (see below), whose sum is σ = 1580413680. Its totient is φ = 270554752.

The previous prime is 689396419. The next prime is 689396443. The reversal of 689396440 is 44693986.

689396440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689396443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160474 + ... + 164713.

Almost surely, 2^689396440 is an apocalyptic number.

It is an amenable number.

689396440 is an abundant number, since it is smaller than the sum of its proper divisors (891017240).

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

689396440 is a wasteful number, since it uses less digits than its factorization.

689396440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325251 (or 325247 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 689396440 is about 26256.3599914383. The cubic root of 689396440 is about 883.3978653065.

The spelling of 689396440 in words is "six hundred eighty-nine million, three hundred ninety-six thousand, four hundred forty".