689952388 has 6 divisors (see below), whose sum is σ = 1207416686. Its totient is φ = 344976192.

The previous prime is 689952383. The next prime is 689952421. The reversal of 689952388 is 883259986.

689952388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 365880384 + 324072004 = 19128^2 + 18002^2 .

It is not an unprimeable number, because it can be changed into a prime (689952383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86244045 + ... + 86244052.

Almost surely, 2^689952388 is an apocalyptic number.

It is an amenable number.

689952388 is a deficient number, since it is larger than the sum of its proper divisors (517464298).

689952388 is a wasteful number, since it uses less digits than its factorization.

689952388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172488101 (or 172488099 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 58.

The square root of 689952388 is about 26266.9447785615. The cubic root of 689952388 is about 883.6352668405.

The spelling of 689952388 in words is "six hundred eighty-nine million, nine hundred fifty-two thousand, three hundred eighty-eight".