80305000 has 40 divisors (see below), whose sum is σ = 188166330. Its totient is φ = 32120000.

The previous prime is 80304947. The next prime is 80305007. The reversal of 80305000 is 50308.

It can be written as a sum of positive squares in 5 ways, for example, as 4301476 + 76003524 = 2074^2 + 8718^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (80305007) 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 9 ways as a sum of consecutive naturals, for example, 3031 + ... + 13030.

Almost surely, 2^80305000 is an apocalyptic number.

It is an amenable number.

80305000 is an abundant number, since it is smaller than the sum of its proper divisors (107861330).

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

80305000 is a wasteful number, since it uses less digits than its factorization.

80305000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16087 (or 16068 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 80305000 is about 8961.3057084333. The cubic root of 80305000 is about 431.4338290704.

Adding to 80305000 its reverse (50308), we get a palindrome (80355308).

The spelling of 80305000 in words is "eighty million, three hundred five thousand".