80186728 has 16 divisors (see below), whose sum is σ = 151840260. Its totient is φ = 39696000.

The previous prime is 80186713. The next prime is 80186731. The reversal of 80186728 is 82768108.

It can be written as a sum of positive squares in 2 ways, for example, as 49028004 + 31158724 = 7002^2 + 5582^2 .

It is a super-2 number, since 2×80186728² = 12859822694691968, 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 in 3 ways as a sum of consecutive naturals, for example, 48813 + ... + 50428.

Almost surely, 2^80186728 is an apocalyptic number.

It is an amenable number.

80186728 is a deficient number, since it is larger than the sum of its proper divisors (71653532).

80186728 is a wasteful number, since it uses less digits than its factorization.

80186728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99348 (or 99344 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 80186728 is about 8954.7042385553. The cubic root of 80186728 is about 431.2219219134.

The spelling of 80186728 in words is "eighty million, one hundred eighty-six thousand, seven hundred twenty-eight".