690744 has 32 divisors (see below), whose sum is σ = 1829520. Its totient is φ = 216576.

The previous prime is 690721. The next prime is 690757. The reversal of 690744 is 447096.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690744.

It is an unprimeable number.

690744 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439 + ... + 1254.

2⁶⁹⁰⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

690744 is an abundant number, since it is smaller than the sum of its proper divisors (1138776).

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

690744 is a wasteful number, since it uses less digits than its factorization.

690744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1715 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 690744 is about 831.1101010095. The cubic root of 690744 is about 88.3973081905.

The spelling of 690744 in words is "six hundred ninety thousand, seven hundred forty-four".