28177079 has 12 divisors (see below), whose sum is σ = 32844336. Its totient is φ = 23679552.

The previous prime is 28177073. The next prime is 28177087. The reversal of 28177079 is 97077182.

It is not a de Polignac number, because 28177079 - 2⁴ = 28177063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28177073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18947 + ... + 20379.

It is an arithmetic number, because the mean of its divisors is an integer number (2737028).

Almost surely, 2^28177079 is an apocalyptic number.

28177079 is a deficient number, since it is larger than the sum of its proper divisors (4667257).

28177079 is an equidigital number, since it uses as much as digits as its factorization.

28177079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 28177079 is about 5308.2086432242. The cubic root of 28177079 is about 304.2976907044.

The spelling of 28177079 in words is "twenty-eight million, one hundred seventy-seven thousand, seventy-nine".