40045530 has 64 divisors (see below), whose sum is σ = 114628608. Its totient is φ = 8754240.

The previous prime is 40045517. The next prime is 40045547. The reversal of 40045530 is 3554004.

It is a happy number.

40045530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 40045497 and 40045506.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 685 + ... + 8975.

It is an arithmetic number, because the mean of its divisors is an integer number (1791072).

Almost surely, 2^40045530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40045530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57314304).

40045530 is an abundant number, since it is smaller than the sum of its proper divisors (74583078).

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

40045530 is a wasteful number, since it uses less digits than its factorization.

40045530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 40045530 is about 6328.1537591939. The cubic root of 40045530 is about 342.1248988086.

Adding to 40045530 its reverse (3554004), we get a palindrome (43599534).

The spelling of 40045530 in words is "forty million, forty-five thousand, five hundred thirty".