690736 has 20 divisors (see below), whose sum is σ = 1397232. Its totient is φ = 330176.

The previous prime is 690721. The next prime is 690757. The reversal of 690736 is 637096.

It is a junction number, because it is equal to n+sod(n) for n = 690698 and 690707.

It is an unprimeable 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, 571 + ... + 1306.

2⁶⁹⁰⁷³⁶ is an apocalyptic number.

It is an amenable number.

690736 is an abundant number, since it is smaller than the sum of its proper divisors (706496).

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

690736 is a wasteful number, since it uses less digits than its factorization.

690736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 690736 is about 831.1052881555. The cubic root of 690736 is about 88.3969669250.

The spelling of 690736 in words is "six hundred ninety thousand, seven hundred thirty-six".