690258 has 16 divisors (see below), whose sum is σ = 1428480. Its totient is φ = 222096.

The previous prime is 690233. The next prime is 690259. The reversal of 690258 is 852096.

It is a super-2 number, since 2×690258² = 952912213128, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690258.

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

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, 1810 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (89280).

2⁶⁹⁰²⁵⁸ is an apocalyptic number.

690258 is an abundant number, since it is smaller than the sum of its proper divisors (738222).

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

690258 is a wasteful number, since it uses less digits than its factorization.

690258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 690258 is about 830.8176695280. The cubic root of 690258 is about 88.3765715300.

The spelling of 690258 in words is "six hundred ninety thousand, two hundred fifty-eight".