690220 has 12 divisors (see below), whose sum is σ = 1449504. Its totient is φ = 276080.

The previous prime is 690187. The next prime is 690233. The reversal of 690220 is 22096.

It is an unprimeable number.

690220 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 3 ways as a sum of consecutive naturals, for example, 17236 + ... + 17275.

It is an arithmetic number, because the mean of its divisors is an integer number (120792).

2⁶⁹⁰²²⁰ is an apocalyptic number.

It is an amenable number.

690220 is an abundant number, since it is smaller than the sum of its proper divisors (759284).

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

690220 is a wasteful number, since it uses less digits than its factorization.

690220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34520 (or 34518 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 690220 is about 830.7948001763. The cubic root of 690220 is about 88.3749497348.

It can be divided in two parts, 6 and 90220, that multiplied together give a triangular number (541320 = T₁₀₄₀).

The spelling of 690220 in words is "six hundred ninety thousand, two hundred twenty".