690344 has 8 divisors (see below), whose sum is σ = 1294410. Its totient is φ = 345168.

The previous prime is 690341. The next prime is 690367. The reversal of 690344 is 443096.

It can be written as a sum of positive squares in only one way, i.e., 688900 + 1444 = 830^2 + 38^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (690341) 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 as a sum of consecutive naturals, namely, 43139 + ... + 43154.

2⁶⁹⁰³⁴⁴ is an apocalyptic number.

It is an amenable number.

690344 is a deficient number, since it is larger than the sum of its proper divisors (604066).

690344 is a wasteful number, since it uses less digits than its factorization.

690344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86299 (or 86295 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 690344 is about 830.8694241576. The cubic root of 690344 is about 88.3802416888.

The spelling of 690344 in words is "six hundred ninety thousand, three hundred forty-four".