404690 has 32 divisors (see below), whose sum is σ = 858816. Its totient is φ = 135360.

The previous prime is 404671. The next prime is 404693. The reversal of 404690 is 96404.

404690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×404690² = 327547992200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404693) by changing a digit.

404690 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 15 ways as a sum of consecutive naturals, for example, 1289 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (26838).

2⁴⁰⁴⁶⁹⁰ is an apocalyptic number.

404690 is an abundant number, since it is smaller than the sum of its proper divisors (454126).

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

404690 is a wasteful number, since it uses less digits than its factorization.

404690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314.

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

The square root of 404690 is about 636.1524974407. The cubic root of 404690 is about 73.9674802326.

The spelling of 404690 in words is "four hundred four thousand, six hundred ninety".