690836 has 6 divisors (see below), whose sum is σ = 1208970. Its totient is φ = 345416.

The previous prime is 690817. The next prime is 690839. The reversal of 690836 is 638096.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 688900 + 1936 = 830^2 + 44^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86351 + ... + 86358.

It is an arithmetic number, because the mean of its divisors is an integer number (201495).

2⁶⁹⁰⁸³⁶ is an apocalyptic number.

It is an amenable number.

690836 is a deficient number, since it is larger than the sum of its proper divisors (518134).

690836 is a wasteful number, since it uses less digits than its factorization.

690836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172713 (or 172711 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 690836 is about 831.1654468275. The cubic root of 690836 is about 88.4012325538.

The spelling of 690836 in words is "six hundred ninety thousand, eight hundred thirty-six".