80030781 has 32 divisors (see below), whose sum is σ = 126731520. Its totient is φ = 49738752.

The previous prime is 80030737. The next prime is 80030803. The reversal of 80030781 is 18703008.

It is not a de Polignac number, because 80030781 - 2⁷ = 80030653 is a prime.

It is a super-2 number, since 2×80030781² = 12809851814939922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80030711) 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 31 ways as a sum of consecutive naturals, for example, 51096 + ... + 52638.

It is an arithmetic number, because the mean of its divisors is an integer number (3960360).

Almost surely, 2^80030781 is an apocalyptic number.

It is an amenable number.

80030781 is a deficient number, since it is larger than the sum of its proper divisors (46700739).

80030781 is a wasteful number, since it uses less digits than its factorization.

80030781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682 (or 1676 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 80030781 is about 8945.9924547252. The cubic root of 80030781 is about 430.9421939653.

Adding to 80030781 its reverse (18703008), we get a palindrome (98733789).

The spelling of 80030781 in words is "eighty million, thirty thousand, seven hundred eighty-one".