306398825 has 6 divisors (see below), whose sum is σ = 379934574. Its totient is φ = 245119040.

The previous prime is 306398821. The next prime is 306398831. The reversal of 306398825 is 528893603.

It can be written as a sum of positive squares in 3 ways, for example, as 12482089 + 293916736 = 3533^2 + 17144^2 .

It is not a de Polignac number, because 306398825 - 2² = 306398821 is a prime.

It is a super-2 number, since 2×306398825² = 187760479922761250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (306398821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6127952 + ... + 6128001.

It is an arithmetic number, because the mean of its divisors is an integer number (63322429).

Almost surely, 2^306398825 is an apocalyptic number.

It is an amenable number.

306398825 is a deficient number, since it is larger than the sum of its proper divisors (73535749).

306398825 is a wasteful number, since it uses less digits than its factorization.

306398825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12255963 (or 12255958 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 306398825 is about 17504.2516263907. The cubic root of 306398825 is about 674.1590441709.

The spelling of 306398825 in words is "three hundred six million, three hundred ninety-eight thousand, eight hundred twenty-five".