1040445520 has 40 divisors (see below), whose sum is σ = 2478044520. Its totient is φ = 406026240.

The previous prime is 1040445473. The next prime is 1040445521. The reversal of 1040445520 is 255440401.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 254016 + 1040191504 = 504^2 + 32252^2 .

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 (1040445521) 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, 155325 + ... + 161884.

It is an arithmetic number, because the mean of its divisors is an integer number (61951113).

Almost surely, 2^1040445520 is an apocalyptic number.

1040445520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040445520 is an abundant number, since it is smaller than the sum of its proper divisors (1437599000).

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

1040445520 is a wasteful number, since it uses less digits than its factorization.

1040445520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317263 (or 317257 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1040445520 is about 32255.9377479558. The cubic root of 1040445520 is about 1013.3040571336.

Adding to 1040445520 its reverse (255440401), we get a palindrome (1295885921).

The spelling of 1040445520 in words is "one billion, forty million, four hundred forty-five thousand, five hundred twenty".