445404 has 12 divisors (see below), whose sum is σ = 1039304. Its totient is φ = 148464.

The previous prime is 445363. The next prime is 445427. The reversal of 445404 is 404544.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18547 + ... + 18570.

2⁴⁴⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

445404 is an abundant number, since it is smaller than the sum of its proper divisors (593900).

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

445404 is a wasteful number, since it uses less digits than its factorization.

445404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37124 (or 37122 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 445404 is about 667.3859453120. The cubic root of 445404 is about 76.3691642051.

Adding to 445404 its reverse (404544), we get a palindrome (849948).

It can be divided in two parts, 44540 and 4, that added together give a palindrome (44544).

The spelling of 445404 in words is "four hundred forty-five thousand, four hundred four".