30752005 has 8 divisors (see below), whose sum is σ = 36949752. Its totient is φ = 24570048.

The previous prime is 30751999. The next prime is 30752023. The reversal of 30752005 is 50025703.

It can be written as a sum of positive squares in 4 ways, for example, as 12723489 + 18028516 = 3567^2 + 4246^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 30752005 - 2²¹ = 28654853 is a prime.

It is a Duffinian number.

It is a congruent 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, 879 + ... + 7891.

It is an arithmetic number, because the mean of its divisors is an integer number (4618719).

Almost surely, 2^30752005 is an apocalyptic number.

It is an amenable number.

30752005 is a deficient number, since it is larger than the sum of its proper divisors (6197747).

30752005 is an equidigital number, since it uses as much as digits as its factorization.

30752005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7895.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 30752005 is about 5545.4490350196. The cubic root of 30752005 is about 313.2981368594.

Adding to 30752005 its reverse (50025703), we get a palindrome (80777708).

The spelling of 30752005 in words is "thirty million, seven hundred fifty-two thousand, five".