40305530 has 8 divisors (see below), whose sum is σ = 72549972. Its totient is φ = 16122208.

The previous prime is 40305523. The next prime is 40305553. The reversal of 40305530 is 3550304.

40305530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 39929761 + 375769 = 6319^2 + 613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×40305530³ (a number of 24 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 2015267 + ... + 2015286.

Almost surely, 2^40305530 is an apocalyptic number.

40305530 is a deficient number, since it is larger than the sum of its proper divisors (32244442).

40305530 is a wasteful number, since it uses less digits than its factorization.

40305530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030560.

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 40305530 is about 6348.6636389086. The cubic root of 40305530 is about 342.8637299495.

Adding to 40305530 its reverse (3550304), we get a palindrome (43855834).

The spelling of 40305530 in words is "forty million, three hundred five thousand, five hundred thirty".