690252 has 24 divisors (see below), whose sum is σ = 1629936. Its totient is φ = 227328.

The previous prime is 690233. The next prime is 690259. The reversal of 690252 is 252096.

It is not an unprimeable number, because it can be changed into a prime (690259) by changing a digit.

690252 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868 + ... + 1460.

It is an arithmetic number, because the mean of its divisors is an integer number (67914).

2⁶⁹⁰²⁵² is an apocalyptic number.

It is an amenable number.

690252 is an abundant number, since it is smaller than the sum of its proper divisors (939684).

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

690252 is a wasteful number, since it uses less digits than its factorization.

690252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 690252 is about 830.8140586196. The cubic root of 690252 is about 88.3763154610.

The spelling of 690252 in words is "six hundred ninety thousand, two hundred fifty-two".