305666426 has 16 divisors (see below), whose sum is σ = 522814824. Its totient is φ = 132777984.

The previous prime is 305666419. The next prime is 305666429. The reversal of 305666426 is 624666503.

It can be written as a sum of positive squares in 4 ways, for example, as 211557025 + 94109401 = 14545^2 + 9701^2 .

It is a super-2 number, since 2×305666426² = 186863927967226952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 305666426.

It is not an unprimeable number, because it can be changed into a prime (305666429) 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 7 ways as a sum of consecutive naturals, for example, 345335 + ... + 346218.

Almost surely, 2^305666426 is an apocalyptic number.

305666426 is a deficient number, since it is larger than the sum of its proper divisors (217148398).

305666426 is a wasteful number, since it uses less digits than its factorization.

305666426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691585.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 305666426 is about 17483.3185065079. The cubic root of 305666426 is about 673.6214579636.

The spelling of 305666426 in words is "three hundred five million, six hundred sixty-six thousand, four hundred twenty-six".