690912 has 36 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 230208.

The previous prime is 690889. The next prime is 690919. The reversal of 690912 is 219096.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690919) by changing a digit.

690912 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 912 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (54600).

2⁶⁹⁰⁹¹² is an apocalyptic number.

It is an amenable number.

690912 is an abundant number, since it is smaller than the sum of its proper divisors (1274688).

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

690912 is a wasteful number, since it uses less digits than its factorization.

690912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415 (or 2404 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 690912 is about 831.2111645063. The cubic root of 690912 is about 88.4044741564.

The spelling of 690912 in words is "six hundred ninety thousand, nine hundred twelve".