45040 has 20 divisors (see below), whose sum is σ = 104904. Its totient is φ = 17984.

The previous prime is 45013. The next prime is 45053. The reversal of 45040 is 4054.

It is a tau number, because it is divible by the number of its divisors (20).

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 45040.

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, 202 + ... + 361.

2⁴⁵⁰⁴⁰ is an apocalyptic number.

45040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45040 is an abundant number, since it is smaller than the sum of its proper divisors (59864).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52452).

45040 is a wasteful number, since it uses less digits than its factorization.

45040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 45040 is about 212.2262943181. The cubic root of 45040 is about 35.5794688669.

Adding to 45040 its reverse (4054), we get a palindrome (49094).

The spelling of 45040 in words is "forty-five thousand, forty".