45081040 has 40 divisors (see below), whose sum is σ = 105850368. Its totient is φ = 17854080.

The previous prime is 45081007. The next prime is 45081061. The reversal of 45081040 is 4018054.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5505 + ... + 10975.

Almost surely, 2^45081040 is an apocalyptic number.

45081040 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 45081040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52925184).

45081040 is an abundant number, since it is smaller than the sum of its proper divisors (60769328).

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

45081040 is a wasteful number, since it uses less digits than its factorization.

45081040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5587 (or 5581 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 45081040 is about 6714.2415804021. The cubic root of 45081040 is about 355.9027213901.

Adding to 45081040 its reverse (4018054), we get a palindrome (49099094).

The spelling of 45081040 in words is "forty-five million, eighty-one thousand, forty".