80784356 has 6 divisors (see below), whose sum is σ = 141372630. Its totient is φ = 40392176.

The previous prime is 80784337. The next prime is 80784367. The reversal of 80784356 is 65348708.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77721856 + 3062500 = 8816^2 + 1750^2 .

It is a super-2 number, since 2×80784356² = 13052224348669472, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10098041 + ... + 10098048.

It is an arithmetic number, because the mean of its divisors is an integer number (23562105).

Almost surely, 2^80784356 is an apocalyptic number.

It is an amenable number.

80784356 is a deficient number, since it is larger than the sum of its proper divisors (60588274).

80784356 is a wasteful number, since it uses less digits than its factorization.

80784356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20196093 (or 20196091 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 80784356 is about 8988.0117934947. The cubic root of 80784356 is about 432.2905638389.

The spelling of 80784356 in words is "eighty million, seven hundred eighty-four thousand, three hundred fifty-six".