40071530 has 16 divisors (see below), whose sum is σ = 74456064. Its totient is φ = 15511440.

The previous prime is 40071523. The next prime is 40071553. The reversal of 40071530 is 3517004.

It is a happy number.

40071530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 64322 + ... + 64941.

It is an arithmetic number, because the mean of its divisors is an integer number (4653504).

Almost surely, 2^40071530 is an apocalyptic number.

40071530 is a deficient number, since it is larger than the sum of its proper divisors (34384534).

40071530 is a wasteful number, since it uses less digits than its factorization.

40071530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129301.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 40071530 is about 6330.2077375075. The cubic root of 40071530 is about 342.1989255722.

Adding to 40071530 its reverse (3517004), we get a palindrome (43588534).

The spelling of 40071530 in words is "forty million, seventy-one thousand, five hundred thirty".