404136 has 32 divisors (see below), whose sum is σ = 1123200. Its totient is φ = 134640.

The previous prime is 404123. The next prime is 404161. The reversal of 404136 is 631404.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

404136 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 7 ways as a sum of consecutive naturals, for example, 720 + ... + 1151.

It is an arithmetic number, because the mean of its divisors is an integer number (35100).

2⁴⁰⁴¹³⁶ is an apocalyptic number.

It is an amenable number.

404136 is an abundant number, since it is smaller than the sum of its proper divisors (719064).

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

404136 is a wasteful number, since it uses less digits than its factorization.

404136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 1876 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 404136 is about 635.7169181326. The cubic root of 404136 is about 73.9337122479.

The spelling of 404136 in words is "four hundred four thousand, one hundred thirty-six".