4045040 has 40 divisors (see below), whose sum is σ = 9575280. Its totient is φ = 1588736.

The previous prime is 4045009. The next prime is 4045049. The reversal of 4045040 is 405404.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4292 + ... + 5148.

It is an arithmetic number, because the mean of its divisors is an integer number (239382).

Almost surely, 2^4045040 is an apocalyptic number.

4045040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4045040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4787640).

4045040 is an abundant number, since it is smaller than the sum of its proper divisors (5530240).

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

4045040 is a wasteful number, since it uses less digits than its factorization.

4045040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 4045040 is about 2011.2284803075. The cubic root of 4045040 is about 159.3336873568. Note that the first 3 decimals are identical.

The spelling of 4045040 in words is "four million, forty-five thousand, forty".