690404 has 48 divisors (see below), whose sum is σ = 1524096. Its totient is φ = 268800.

The previous prime is 690397. The next prime is 690407. The reversal of 690404 is 404096.

It is a self number, because there is not a number n which added to its sum of digits gives 690404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9689 + ... + 9759.

It is an arithmetic number, because the mean of its divisors is an integer number (31752).

2⁶⁹⁰⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

690404 is an abundant number, since it is smaller than the sum of its proper divisors (833692).

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

690404 is a wasteful number, since it uses less digits than its factorization.

690404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 114 counting only the distinct ones).

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

The square root of 690404 is about 830.9055301296. The cubic root of 690404 is about 88.3828020843.

The spelling of 690404 in words is "six hundred ninety thousand, four hundred four".