305609796 has 18 divisors (see below), whose sum is σ = 772513742. Its totient is φ = 101869920.

The previous prime is 305609779. The next prime is 305609797. The reversal of 305609796 is 697906503.

305609796 is a `hidden beast` number, since 30 + 5 + 609 + 7 + 9 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 194602500 + 111007296 = 13950^2 + 10536^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×305609796² = 186794694822323232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (305609797) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4244545 + ... + 4244616.

Almost surely, 2^305609796 is an apocalyptic number.

305609796 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

305609796 is an abundant number, since it is smaller than the sum of its proper divisors (466903946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

305609796 is a wasteful number, since it uses less digits than its factorization.

305609796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489171 (or 8489166 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 305609796 is about 17481.6988876940. The cubic root of 305609796 is about 673.5798553799.

The spelling of 305609796 in words is "three hundred five million, six hundred nine thousand, seven hundred ninety-six".