305390825 has 6 divisors (see below), whose sum is σ = 378684654. Its totient is φ = 244312640.

The previous prime is 305390807. The next prime is 305390831. The reversal of 305390825 is 528093503.

It can be written as a sum of positive squares in 3 ways, for example, as 18156121 + 287234704 = 4261^2 + 16948^2 .

It is not a de Polignac number, because 305390825 - 2¹⁰ = 305389801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6107792 + ... + 6107841.

It is an arithmetic number, because the mean of its divisors is an integer number (63114109).

Almost surely, 2^305390825 is an apocalyptic number.

It is an amenable number.

305390825 is a deficient number, since it is larger than the sum of its proper divisors (73293829).

305390825 is a wasteful number, since it uses less digits than its factorization.

305390825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12215643 (or 12215638 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 305390825 is about 17475.4349015983. The cubic root of 305390825 is about 673.4189424584.

The spelling of 305390825 in words is "three hundred five million, three hundred ninety thousand, eight hundred twenty-five".