690266 has 4 divisors (see below), whose sum is σ = 1035402. Its totient is φ = 345132.

The previous prime is 690259. The next prime is 690269. The reversal of 690266 is 662096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 687241 + 3025 = 829^2 + 55^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690266.

It is not an unprimeable number, because it can be changed into a prime (690269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172565 + ... + 172568.

2⁶⁹⁰²⁶⁶ is an apocalyptic number.

690266 is a deficient number, since it is larger than the sum of its proper divisors (345136).

690266 is a wasteful number, since it uses less digits than its factorization.

690266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345135.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 690266 is about 830.8224840482. The cubic root of 690266 is about 88.3769129530.

The spelling of 690266 in words is "six hundred ninety thousand, two hundred sixty-six".