690608 has 20 divisors (see below), whose sum is σ = 1417320. Its totient is φ = 324864.

The previous prime is 690607. The next prime is 690611. The reversal of 690608 is 806096.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690608.

It is not an unprimeable number, because it can be changed into a prime (690607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (70866).

2⁶⁹⁰⁶⁰⁸ is an apocalyptic number.

690608 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

690608 is an abundant number, since it is smaller than the sum of its proper divisors (726712).

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

690608 is a wasteful number, since it uses less digits than its factorization.

690608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 690608 is about 831.0282787006. The cubic root of 690608 is about 88.3915063193.

The spelling of 690608 in words is "six hundred ninety thousand, six hundred eight".