445140 has 36 divisors (see below), whose sum is σ = 1350804. Its totient is φ = 118656.

The previous prime is 445103. The next prime is 445141. The reversal of 445140 is 41544.

It can be written as a sum of positive squares in 2 ways, for example, as 248004 + 197136 = 498^2 + 444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1057 + ... + 1416.

2⁴⁴⁵¹⁴⁰ is an apocalyptic number.

It is an amenable number.

445140 is an abundant number, since it is smaller than the sum of its proper divisors (905664).

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

445140 is a wasteful number, since it uses less digits than its factorization.

445140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488 (or 2483 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 445140 is about 667.1881293908. The cubic root of 445140 is about 76.3540727046.

Adding to 445140 its reverse (41544), we get a palindrome (486684).

It can be divided in two parts, 445 and 140, that added together give a palindrome (585).

The spelling of 445140 in words is "four hundred forty-five thousand, one hundred forty".