690436 has 12 divisors (see below), whose sum is σ = 1220940. Its totient is φ = 341600.

The previous prime is 690433. The next prime is 690439. The reversal of 690436 is 634096.

690436 is nontrivially palindromic in base 3.

It is an interprime number because it is at equal distance from previous prime (690433) and next prime (690439).

It can be written as a sum of positive squares in 2 ways, for example, as 430336 + 260100 = 656^2 + 510^2 .

It is not an unprimeable number, because it can be changed into a prime (690433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451 + ... + 1258.

It is an arithmetic number, because the mean of its divisors is an integer number (101745).

2⁶⁹⁰⁴³⁶ is an apocalyptic number.

It is an amenable number.

690436 is a deficient number, since it is larger than the sum of its proper divisors (530504).

690436 is a wasteful number, since it uses less digits than its factorization.

690436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814 (or 1812 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 690436 is about 830.9247860065. The cubic root of 690436 is about 88.3841675679.

The spelling of 690436 in words is "six hundred ninety thousand, four hundred thirty-six".