690044 has 12 divisors (see below), whose sum is σ = 1215984. Its totient is φ = 342624.

The previous prime is 690037. The next prime is 690059. The reversal of 690044 is 440096.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

690044 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152 + ... + 1184.

It is an arithmetic number, because the mean of its divisors is an integer number (101332).

2⁶⁹⁰⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

690044 is a deficient number, since it is larger than the sum of its proper divisors (525940).

690044 is a wasteful number, since it uses less digits than its factorization.

690044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 690044 is about 830.6888707573. The cubic root of 690044 is about 88.3674374859.

The spelling of 690044 in words is "six hundred ninety thousand, forty-four".