690508 has 36 divisors (see below), whose sum is σ = 1519392. Its totient is φ = 272160.

The previous prime is 690493. The next prime is 690509. The reversal of 690508 is 805096.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (690509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2413 + ... + 2683.

2⁶⁹⁰⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (759696).

690508 is an abundant number, since it is smaller than the sum of its proper divisors (828884).

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

690508 is a wasteful number, since it uses less digits than its factorization.

690508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 690508 is about 830.9681100981. The cubic root of 690508 is about 88.3872397517.

The spelling of 690508 in words is "six hundred ninety thousand, five hundred eight".